1. Department of Laboratory Medicine, Yijishan Hospital of Wannan Medical College, Wuhu, Anhui 241000, P.R. China
2. Department of Gastroenterology, The First People's Hospital of Anqing, Anqing, Anhui 246000, P.R. China
3. Department of Medicine, Anhui College of Traditional Chinese Medicine, Wuhu, Anhui 241000, P.R. China
4. Department of Hepatobiliary Surgery, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, P.R. China