1. Department of Endocrinology, Zhoushan Putuo District People's Hospital, Zhoushan, Zhejiang 316199, P.R. China
2. Department of Gastroenterology, Zhoushan Putuo District People's Hospital, Zhoushan, Zhejiang 316199, P.R. China
3. Department of General Surgery, Zhoushan Putuo District People's Hospital, Zhoushan, Zhejiang 316199, P.R. China
4. Department of Research Service, Zhiyuan Medical Inspection Institute Co., Ltd, Hangzhou, Zhejiang 310006, P.R. China