1. Department of Laboratory Medicine, The Third Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563000, P.R. China
2. Sichuan Academy of Medical Sciences and Institute of Dermatology and Venereal Disease, Sichuan Provincial People's Hospital, Chengdu, Sichuan 610031, P.R. China
3. Department of Laboratory Medicine, The First Hospital of Xi'an, Xi'an, Shaanxi 710002, P.R. China
4. Key Laboratory of Clinical Diagnosis of Education Ministry, College of Laboratory Medicine, Chongqing Medical University, Chongqing 400016, P.R. China