1. Department of Gastroenterology, South China Hospital, Medical School, Shenzhen University, Shenzhen, China
2. Department of Paediatrics, South China Hospital, Medical School, Shenzhen University, Shenzhen, China
3. Department of Anesthesiology, South China Hospital, Medical School, Shenzhen University, Shenzhen, China
4. Department of Clinical Laboratory, South China Hospital, Medical School, Shenzhen University, Shenzhen, China
5. Medical Department, Shenzhen Exit-Entry Frontier Inspection Station Hospital, Shenzhen, China