X Y He1, L Xu2, C L Li1, H Xiang3. 1. Department of Pathology, Zhejiang Quhua Hospital, Zhejiang Province, Quzhou 324004, China. 2. Hangzhou Dean Medical Inspection Center, Hangzhou 310000, China. 3. Department of Pathology, the First Affiliated Hospital, Zhejiang University, Hangzhou 310003, China.