1. Department of Gastroenterologythe 2nd Clinical Medicine College (Shenzhen People's Hospital) of Jinan University Shenzhen 518020 China
2. Department of General SurgeryShenzhen Children's Hospital Shenzhen 518026 China
3. Department of HematologyYantian People's Hospital Shenzhen 518000 China
4. Department of GastroenterologyChanghai Hospital Shanghai 200082 China