1. Department of General Surgery, Shanghai Changhai Hospital, Naval Medical University, Shanghai, China
2. Department of Dermatology, Shanghai Ninth People’s Hospital, Shanghai Jiaotong University, Shanghai, China
3. Changhai Clinical Research Unit, Shanghai Changhai Hospital, Naval Medical University, Shanghai, China
4. Department of Gastroenterology, Jinling Hospital, Medical School of Nanjing University, Jiangsu, China