1. School of Nursing, Sun Yat-Sen University, Guangzhou, China
2. Guangdong Institute of Gastroenterology, the Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, Guangdong, China
3. Department of Colorectal Surgery, the Sixth Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
4. Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
5. Department of Gastrointestinal Surgery, The Sixth Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
6. Department of Endocrinology and Metabolism, Third Affiliated Hospital of Sun Yat-Sen University, and Guangdong Provincial Key Laboratory of Diabetology, Guangzhou, China