1. Department of Pathology, The First People's Hospital of Yunnan Province, Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan 650032, P.R. China
2. Department of Pathology, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
3. Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming, Yunnan 650118, P.R. China