1. Department of Gastroenterology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China (mainland)
2. Department of Ophthalmology, Huashan Hospital, Fudan University, Shanghai, China (mainland)
3. Department of Gastroenterology, Shangyu Hospital Affiliated to the Second Affiliated Hospital of Medical College of Zhejiang University, Shoaxing, Zhejiang, China (mainland)