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Original Article
 Evaluation of the characteristics of multiple human papillomavirus (HPV) infections identified using the BD Onclarity HPV assay and comparison with those of single HPV infection
Jinhee Kimorcid, Moonsik Kimorcid, Ji Young Parkorcid
Journal of Pathology and Translational Medicine 2022;56(5):289-293.
DOI: https://doi.org/10.4132/jptm.2022.08.02
Published online: September 13, 2022

Department of Pathology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hospital, Daegu, Korea

Corresponding Author: Ji Young Park, MD, PhD, Department of Pathology, School of Medicine, Kyungpook National University, Kyungpook National University Chilgok Hospital, 807 Hoguk-ro, Buk-gu, Daegu 41404, Korea, Tel: +82-53-200-3391, Fax: +82-53-200-3399, E-mail: jyparkmd@knu.ac.kr
• Received: April 30, 2022   • Revised: July 18, 2022   • Accepted: August 2, 2022

© 2022 The Korean Society of Pathologists/The Korean Society for Cytopathology

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (https://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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  • Background
    Human papillomavirus (HPV) infection is a major cause of cervical cancer and associated precursor lesions. Multiple HPV genotype infections have been reported. However, their clinicopathological characteristics still remain elusive.
  • Methods
    For this study, 814 consecutive patients who had undergone colposcopy and HPV genotyping test using BD Onclarity HPV assay were retrospectively selected. Clinicopathological parameters of multiple HPV infections were compared with those of single HPV infection.
  • Results
    Multiple HPV infections were found in 110 out of 814 cases (13.5%). Multiple HPV infections were associated with a significantly higher incidence of high-grade intraepithelial lesions (HSILs) compared with single HPV infection. Other high-risk HPV genotypes, in addition to HPV 16, were found more frequently in the multiple HPV infections group; these included HPV 51, 52, 33/58, 56/59/66, and 35/39/68. No specific coinfection pattern was not identified. Additionally, the number of HPV genotypes in multiple HPV infections was not associated with the progression to HSIL or squamous cell carcinoma.
  • Conclusions
    Multiple HPV infections have distinct clinicopathological characteristics (compared with single HPV infection). As their biological behavior is uncertain, close and frequent follow-up is warranted.
  • Keywords: papillomavirus; Multiple HPV infection; Cervical intraepithelial neoplasia; Squamous cell carcinoma
Human papillomavirus (HPV) is the major cause of anogenital cancers and their precursor lesions [1]. Sensitive molecular HPV detection methods revealed that nearly all squamous intraepithelial lesions are associated with HPV [2–4]. According to the phylogenetic classification of papillomaviruses, HPVs are categorized in the genus Alphapapillomavirus [5]. Among these, A9 clade and A7 clade, which include HPV 16, and HPV 18 and 45, respectively, are particularly noteworthy [3]. To date, more than 200 HPV genotypes have been identified and listed in the National Institutes of Health’s HPV database (PaVE: The papillomavirus Episteme) [6]. However, only ~20 HPV genotypes are commonly encountered in anogenital lesions. Currently, 12 HPV genotypes, i.e., HPV 16, 18, 31, 33, 35, 39, 45, 51, 52, 56, 58, and 59, are classified as group 1 carcinogens by the International Agency for Research on Cancer [7]. Although HPV 16 and 18 are the predominant causative agents of cervical cancer and their precursor lesions, other high-risk HPVs are also associated with significant oncogenic risk [8].
HPV genotyping tests have also revealed coinfection with multiple HPV genotypes in variable frequencies [9]. The incidence of multiple HPV infections varies depending on the region, ethnicity, and the detection method [10–13]. Although multiple HPV infections have been detected in cervical lesions, their clinicopathological significance remains elusive. While some studies have demonstrated that multiple HPV infections may be associated with cervical carcinogenesis [14,15], others have reported contradicting results [16].
BD Onclarity HPV assay, an U.S. Food and Drug Administration–approved HPV screening test, is a semi-quantitative real-time polymerase chain reaction–based test that can simultaneously detect multiple HPV genotypes, including HPV 16, 18, 31, 45, 51, 52, 33/35, 56/59/66, and 35/39/68 [17]. It is widely used in many hospitals in Korea [18]. In this study, we have investigated the clinicopathological aspects of multiple HPV infections using the BD Onclarity HPV assay.
Study population
We retrospectively selected 814 consecutive patients who had undergone colonoscopy as well as HPV genotyping tests in the department of pathology, Kyungpook National University Chilgok Hospital in 2019. These patients underwent HPV genotyping assays owing to abnormal cytology or biopsy results, or during routine health check-ups. The clinicopathological data, including age and biopsy results, of the patients were retrieved from the electronic medical records of the hospital.
Histological evaluation
Specimens obtained during colposcopy were fixed in 10% neutral-buffered formalin and embedded in paraffin blocks. Paraffin blocks were cut into 4 μm sections and stained with hematoxylin and eosin. Two independent pathologists with specialization in gynecological pathology (M.K. and J.Y.P.) reviewed all the samples. All patients were diagnosed and classified in accordance to the recommendations of the LAST project working group [19].
HPV genotyping test
Onclarity testing uses the automated BD Viper Lt platform (BD Diagnostics, Sparks, MD, USA), the full workflow for which has been described in detail in a previous paper [20]. Briefly, 0.5 mL of original resuspended SurePath material was aliquoted into a BD tube containing 1.7 mL of sample medium. The samples were prewarmed for 30 minutes at 120°C. They were then transferred to the fully automated BD Viper Lt platform and tested using Onclarity according to the manufacturer’s instructions.
Statistical analysis
All statistical analyses were performed using IBM SPSS for Windows ver. 23.0 (IBM Corp., Armonk, NY, USA). The association between clinicopathological parameters was analyzed using the chi-square test or Fisher exact test. p-values < .05 were considered significant. Adjusted p-values using Bonferroni correction were used for multiple comparisons.
HPV genotype prevalence in multiple and single HPV infections
Table 1 presents HPV genotype prevalence in multiple and single HPV infections, respectively. Detailed clinicopathological characteristics of the patient cohorts are listed in Supplementary Table S1. Among 814 cases wherein HPV genotyping tests were performed, multiple HPV infection was found in 110 cases (13.5%, 110/814) and single HPV infections were found in 361 cases (44.3%, 361/814). The mean age of the patients was 58.2 years in the multiple HPV infections group and 55.5 years in the single HPV infection group. In the multiple HPV infections group, HPV 35/39/68 was most frequently detected, followed by 56/59/66, 16, and 52. In the single HPV infection group, HPV 16 was most frequently detected, followed by 56/59/66, 35/39/68, and 52. HPV 31 (p = .005), 51 (p < .001), 52 (p < .001), 33/58 (p < .001), 56/59/66 (p < .001), and 35/39/68 (p < .001) were significantly more frequently detected in the multiple HPV infections group. Multiple infections among grouped HPV strains, for example, HPV 33 and 58, can possibly happen. However, such possible cases were counted as single HPV infection, based on the previous study [17]. The result of full HPV genotyping assay in a different cohort using Seegene Anyplex II also suggested that multiple infections within three bulk groups (33/35, 56/59/66, and 35/39/68) were not frequent (Supplementary Table S2).
Association of multiple HPV infection with histology
We then investigated the association between HPV infection status and histological diagnosis of cervical lesions. Of note, multiple HPV infections showed more significant association with high-grade squamous intraepithelial lesions (HSILs) compared with single HPV infection (p = .033) (Table 2). Low-grade squamous intraepithelial lesions (LSILs), squamous cell carcinoma (SQCC), and adenocarcinoma (ADC) were also more frequent in the multiple HPV infections group, albeit this was not significant. In the multiple HPV infections group, HPV 16 was the most frequently detected HPV genotype in LSILs, HSILs, SQCC, and ADC (Table 3). In the single HPV infection group, HPV 16 was the most frequently detected HPV genotype in HSILs and SQCC. In addition to HPV 16, other high-risk HPV genotypes were also detected more frequently in the patients with ≥ HSIL lesions (HSIL and SQCC), which suggests clinical significance. Among these, HPV 51, 52, 33/58, 56/59/66, and 35/39/68 were more frequently found in the multiple HPV infections group than in the single HPV infection group (Table 4, Fig. 1). In the multiple HPV group, there was no correlation between the number of infected HPV strains and the progression to cervical cancer and their precursor lesions (Supplementary Table S3). Although HPV 16 was the most frequently detected HPV genotype in multiple HPV infections, the presence of HPV 16 genotype in multiple HPV infections was not associated with the progression to cervical neoplastic lesions (compared with non-HPV 16 type of multiple HPV infections) (Supplementary Table S4). We further divided the study cases into two groups according to the HPV 16 or/and HPV 18 infection status (group 1: HPV 16 or/and HPV18 infection vs. group 2: non–HPV 16 and non–HPV 18 high-risk HPV). In both groups, there were no statistically significant correlation between multiple HPV infection and cervical lesions. However, HSIL tended to occur more frequently in group 2 (Supplementary Tables S5, S6).
In this study, we demonstrated the clinicopathological implications of multiple HPV infections in Korean patients, using the BD Onclarity HPV assay. Multiple HPV infections were more closely related to HSILs than single HPV infection. In addition, we report that high-risk HPV genotypes other than HPV 16 were detected more frequently in the multiple HPV infections group. In our previous study, using Seegene Anyplex II HPV28 detection kit, we showed that multiple HPV infections were related to HSIL and persistent HPV infection [21]. However, Seegene Anyplex II and BD Onclarity assays have different ranges and use different probes for the detection of HPV [22]. The two HPV genotyping assays, thus, might have different performance capacity for the detection of multiple HPV infections. Therefore, we re-investigated the clinicopathological aspects of multiple HPV infections using the BD Onclarity HPV assay.
The clinicopathological significance of multiple HPV infections still remains debatable. Overall, HPV 31, 51, 52, 33/58, 56/59/66, and 35/39/68 genotypes were more frequently detected in multiple HPV infections than in single HPV infection. The incidence of HPV genotypes in multiple HPV infections greatly differs across studies, depending on regional variation, ethnicity, and participant characteristics [12,14,23].
In this study, multiple HPV infection was significantly associated with HSIL, which was consistent with the results from our previous study. Oncogenic risk of multiple HPV infections is still unclear. While some previous studies have shown that multiple HPV infections contribute to cervical carcinogenesis, other studies have shown that multiple HPV infections do not confer additional carcinogenic effect (compared to single HPV infection) [10,16, 24,25]. Thus, a larger cohort study may be instrumental in validating the oncogenic potential of multiple HPV infection.
In multiple HPV infection, HPV 16 was the most prevalent HPV genotype in SIL and SQCC. However, other high-risk HPV genotypes were also more frequently detected in multiple HPV infections than in single HPV infection. In particular, HPV 51, 52, 33/58, 56/59/66, and 35/39/68 showed significant association with ≥HSILs in multiple HPV infections. There was no difference between the HPV 16–positive multiple HPV infections group and the HPV 16–negative multiple HPV infections group. We also divided study cases into HPV 16 or/and HPV18 infection group and non–HPV 16 and non–HPV 18 high-risk group, and further investigated the association between the multiple infection and the histology of cervical lesions in both groups; however, significant associations were not found. In non–HPV 16 and non–HPV 18 high-risk HPV group, HSIL tended to occur more frequently among multiple HPV infections. Thus, coinfection with non–HPV 16 and non–HPV 18 high-risk HPV genotypes might have synergistic effect on cervical carcinogenesis. Subsequent larger cohort study or expanded full genotyping assay should be followed to validate this hypothesis.
This study has a few limitations. First, this study has a relatively small sample size. Subsequent studies with larger cohort would be valuable to further strengthen the major findings of this study. In addition, we were unable to evaluate the effect of multiple HPV genotypes on the duration of HPV infection, as we could not perform the follow-up HPV genotyping test using BD Onclarity HPV assay.
In conclusion, multiple HPV infections have distinct clinicopathological characteristics. As their clinicopathological characteristics are still uncertain, close follow-up is warranted for the patients with multiple HPV infections.
The Data Supplement is available with this article at https://doi.org/10.4132/jptm.2022.08.02.
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The authors are grateful for the support provided by the Molecular Pathology Laboratory, Kyungpook National University Chilgok Hospital.
Fig. 1
Human papillomavirus (HPV) genotype prevalence in high-grade intraepithelial lesions (A) and squamous cell carcinoma (B) in multiple and single HPV infections.
jptm-2022-08-02f1.jpg
Table 1
Prevalance of HPV genotypes (multiple and single HPV infections)
Variable No. (%) HPV infection status (n = 471) p-value
Multiple (n = 110) Single (n = 361)
Age (yr) 58.2 ± 12.6 55.5 ± 11.9 .043
HPV type
 16 125 (26.5) 39 (35.5) 86 (23.8) .019
 18 36 (7.6) 11 (10.0) 25 (6.9) .107
 31 34 (7.2) 15 (13.6) 19 (5.3) .005a
 45 7 (1.5) 5 (4.5) 2 (5.5) .091
 51 33 (7.0) 19 (17.3) 14 (3.9) < .001a
 52 85 (18.0) 36 (32.7) 49 (13.6) < .001a
 33/58 64 (13.6) 29 (26.4) 35 (9.7) < .001a
 56/59/66 113 (24.0) 46 (41.8) 67 (18.6) < .001a
 35/39/68 111 (23.6) 47 (42.7) 64 (17.7) < .001a

Values are presented as mean ± standard deviation or number (%).

aSignificant p-value obtained after Bonferroni correction (corrected p-value: .05/9 = .006; all 9 human papillomavirus [HPV] classes were included) was found between multiple and single HPV infection groups.

Table 2
HPV infection status (multiple and single HPV infections) in association with histology
Variable No. (%) HPV infection status (n = 471) p-value
Multiple (n = 110) Single (n = 361)
Histology
 Normal 210 (44.5) 34 (30.9) 176 (48.8) .001
 LSIL 62 (13.2) 16 (14.5) 46 (12.7) .632
 HSIL 120 (25.5) 37 (33.6) 83 (23.0) .033
 Squamous cell carcinoma 65 (13.8) 18 (16.4) 47 (13.0) .654
 Adenocarcinoma 14 (3.0) 5 (4.6) 9 (2.5) .332

Values are presented as number (%).

HPV, human papillomavirus; LSIL, low-grade squamous intraepithelial lesion; HSIL, high-grade squamous intraepithelial lesion.

Table 3
HPV genotype distribution (multiple and single HPV infections) in association with histology
HPV type Multiple HPV infection Single HPV infection
Normal (n = 34) LSIL (n = 16) HSIL (n = 37) SQCC (n = 18) ADC (n = 5) Normal (n = 176) LSIL (n = 46) HSIL (n = 83) SQCC (n = 47) ADC (n = 9)
16 2 (5.9) 7 (43.8) 17 (45.9) 10 (55.6) 3 (60.0) 24 (13.6) 6 (13.0) 34 (41.0) 19 (40.4) 3 (33.3)
18 2 (5.9) 1 (6.3) 4 (10.8) 3 (16.7) 1 (20.0) 1 (0.6) 2 (4.3) 5 (6.0) 12 (25.5) 5 (55.6)
31 6 (17.6) 1 (6.3) 4 (10.8) 4 (22.2) 0 8 (4.5) 3 (6.5) 5 (6.0) 3 (6.4) 0
45 1 (2.9) 2 (12.5) 1 (2.7) 1 (5.6) 0 2 (1.1) 0 0 0 0
51 9 (26.5) 0 8 (21.6) 2 (11.1) 0 9 (5.1) 2 (4.3) 3 (3.6) 0 0
52 12 (35.3) 7 (43.8) 8 (21.6) 6 (33.3) 3 (60.0) 35 (19.9) 7 (15.2) 4 (4.8) 4 (8.5) 0
33/58 11 (32.3) 3 (18.8) 7 (18.9) 7 (38.9) 1 (20.0) 19 (10.8) 3 (6.5) 12 (14.5) 1 (2.1) 0
56/59/66 15 (44.1) 8 (50.0) 15 (40.5) 7 (38.9) 1 (20.0) 42 (23.9) 12 (26.1) 7 (8.4) 6 (12.8) 0
35/39/68 18 (52.9) 8 (50.0) 14 (37.8) 5 (27.8) 2 (40.0) 37 (21.0) 11 (23.9) 13 (15.7) 2 (4.3) 1 (11.1)

Values are presented as number (%).

HPV, human papillomavirus; LSIL, low-grade squamous intraepithelial lesion; HSIL, high-grade squamous intraepithelial lesion; SQCC, squamous cell carcinoma; ADC, adenocarcinoma.

Table 4
Association between ≥ HSIL lesion (HSIL and SQCC) and HPV genotypes (multiple and single HPV infections)
HPV type No. (%) HPV infection status (n = 199) p-value
Multiple ( n = 60) Single (n = 139)
16 86 (43.2) 30 (50.0) 56 (40.3) .216
18 30 (15.1) 8 (13.1) 22 (15.8) .676
31 16 (8.0) 8 (13.1) 8 (5.8) .089
45 2 (1.0) 2 (3.3) 0 .091
51 13 (6.5) 10 (16.7) 3 (2.2) < .001a
52 25 (12.6) 17 (28.3) 8 (5.8) < .001a
33/58 28 (14.1) 15 (25.0) 13 (9.4) .005a
56/59/66 36 (18.1) 23 (38.3) 13 (9.4) < .001a
35/39/68 37 (18.6) 21 (35.0) 16 (11.5) < .001a

Values are presented as number (%).

HSIL, high-grade intraepithelial lesion; SQCC, squamous cell carcinoma; HPV, human papillomavirus.

aSignificant p-value obtained after Bonferroni correction (corrected p-value: .05/9 = .006; all 9 HPV classes were included) was found between multiple and single HPV infection groups.

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      Evaluation of the characteristics of multiple human papillomavirus (HPV) infections identified using the BD Onclarity HPV assay and comparison with those of single HPV infection
      J Pathol Transl Med. 2022;56(5):289-293.   Published online September 13, 2022
      DOI: https://doi.org/10.4132/jptm.2022.08.02
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    Evaluation of the characteristics of multiple human papillomavirus (HPV) infections identified using the BD Onclarity HPV assay and comparison with those of single HPV infection
    Image
    Fig. 1 Human papillomavirus (HPV) genotype prevalence in high-grade intraepithelial lesions (A) and squamous cell carcinoma (B) in multiple and single HPV infections.

    Fig. 1

    Evaluation of the characteristics of multiple human papillomavirus (HPV) infections identified using the BD Onclarity HPV assay and comparison with those of single HPV infection
    Variable No. (%) HPV infection status (n = 471) p-value
    Multiple (n = 110) Single (n = 361)
    Age (yr) 58.2 ± 12.6 55.5 ± 11.9 .043
    HPV type
     16 125 (26.5) 39 (35.5) 86 (23.8) .019
     18 36 (7.6) 11 (10.0) 25 (6.9) .107
     31 34 (7.2) 15 (13.6) 19 (5.3) .005a
     45 7 (1.5) 5 (4.5) 2 (5.5) .091
     51 33 (7.0) 19 (17.3) 14 (3.9) < .001a
     52 85 (18.0) 36 (32.7) 49 (13.6) < .001a
     33/58 64 (13.6) 29 (26.4) 35 (9.7) < .001a
     56/59/66 113 (24.0) 46 (41.8) 67 (18.6) < .001a
     35/39/68 111 (23.6) 47 (42.7) 64 (17.7) < .001a
    Variable No. (%) HPV infection status (n = 471) p-value
    Multiple (n = 110) Single (n = 361)
    Histology
     Normal 210 (44.5) 34 (30.9) 176 (48.8) .001
     LSIL 62 (13.2) 16 (14.5) 46 (12.7) .632
     HSIL 120 (25.5) 37 (33.6) 83 (23.0) .033
     Squamous cell carcinoma 65 (13.8) 18 (16.4) 47 (13.0) .654
     Adenocarcinoma 14 (3.0) 5 (4.6) 9 (2.5) .332
    HPV type Multiple HPV infection Single HPV infection
    Normal (n = 34) LSIL (n = 16) HSIL (n = 37) SQCC (n = 18) ADC (n = 5) Normal (n = 176) LSIL (n = 46) HSIL (n = 83) SQCC (n = 47) ADC (n = 9)
    16 2 (5.9) 7 (43.8) 17 (45.9) 10 (55.6) 3 (60.0) 24 (13.6) 6 (13.0) 34 (41.0) 19 (40.4) 3 (33.3)
    18 2 (5.9) 1 (6.3) 4 (10.8) 3 (16.7) 1 (20.0) 1 (0.6) 2 (4.3) 5 (6.0) 12 (25.5) 5 (55.6)
    31 6 (17.6) 1 (6.3) 4 (10.8) 4 (22.2) 0 8 (4.5) 3 (6.5) 5 (6.0) 3 (6.4) 0
    45 1 (2.9) 2 (12.5) 1 (2.7) 1 (5.6) 0 2 (1.1) 0 0 0 0
    51 9 (26.5) 0 8 (21.6) 2 (11.1) 0 9 (5.1) 2 (4.3) 3 (3.6) 0 0
    52 12 (35.3) 7 (43.8) 8 (21.6) 6 (33.3) 3 (60.0) 35 (19.9) 7 (15.2) 4 (4.8) 4 (8.5) 0
    33/58 11 (32.3) 3 (18.8) 7 (18.9) 7 (38.9) 1 (20.0) 19 (10.8) 3 (6.5) 12 (14.5) 1 (2.1) 0
    56/59/66 15 (44.1) 8 (50.0) 15 (40.5) 7 (38.9) 1 (20.0) 42 (23.9) 12 (26.1) 7 (8.4) 6 (12.8) 0
    35/39/68 18 (52.9) 8 (50.0) 14 (37.8) 5 (27.8) 2 (40.0) 37 (21.0) 11 (23.9) 13 (15.7) 2 (4.3) 1 (11.1)
    HPV type No. (%) HPV infection status (n = 199) p-value
    Multiple ( n = 60) Single (n = 139)
    16 86 (43.2) 30 (50.0) 56 (40.3) .216
    18 30 (15.1) 8 (13.1) 22 (15.8) .676
    31 16 (8.0) 8 (13.1) 8 (5.8) .089
    45 2 (1.0) 2 (3.3) 0 .091
    51 13 (6.5) 10 (16.7) 3 (2.2) < .001a
    52 25 (12.6) 17 (28.3) 8 (5.8) < .001a
    33/58 28 (14.1) 15 (25.0) 13 (9.4) .005a
    56/59/66 36 (18.1) 23 (38.3) 13 (9.4) < .001a
    35/39/68 37 (18.6) 21 (35.0) 16 (11.5) < .001a
    Table 1 Prevalance of HPV genotypes (multiple and single HPV infections)

    Values are presented as mean ± standard deviation or number (%).

    Significant p-value obtained after Bonferroni correction (corrected p-value: .05/9 = .006; all 9 human papillomavirus [HPV] classes were included) was found between multiple and single HPV infection groups.

    Table 2 HPV infection status (multiple and single HPV infections) in association with histology

    Values are presented as number (%).

    HPV, human papillomavirus; LSIL, low-grade squamous intraepithelial lesion; HSIL, high-grade squamous intraepithelial lesion.

    Table 3 HPV genotype distribution (multiple and single HPV infections) in association with histology

    Values are presented as number (%).

    HPV, human papillomavirus; LSIL, low-grade squamous intraepithelial lesion; HSIL, high-grade squamous intraepithelial lesion; SQCC, squamous cell carcinoma; ADC, adenocarcinoma.

    Table 4 Association between ≥ HSIL lesion (HSIL and SQCC) and HPV genotypes (multiple and single HPV infections)

    Values are presented as number (%).

    HSIL, high-grade intraepithelial lesion; SQCC, squamous cell carcinoma; HPV, human papillomavirus.

    Significant p-value obtained after Bonferroni correction (corrected p-value: .05/9 = .006; all 9 HPV classes were included) was found between multiple and single HPV infection groups.

    Table 1

    Table 2

    Table 3

    Table 4

    J Pathol Transl Med : Journal of Pathology and Translational Medicine
    © The Korean Society of Pathologists and the Korean Society for Cytopathology.
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