1. Department of Clinical Laboratory, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Science, Beijing 100730, P.R. China
2. Department of Pathology, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Science, Beijing 100730, P.R. China
3. Department of Clinical Laboratory, Zhejiang Cancer Hospital, Hangzhou, Zhejiang 310022, P.R. China