1. School of Nursing, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
2. Department of General Surgery, The First Affiliated Hospital of Nanjing Medical University & Jiangsu Province Hospital, Nanjing, Jiangsu 210029, P.R. China
3. Department of Gastroenterology, The First Affiliated Hospital with Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China