Weifang Medical University, Weifang 261031, China
1Department of Oncology, Affiliated Hospital of Weifang Medical University, Weifang, China
© 2019 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 (http://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.