[1] Guangdong Provincal Hospital of Traditional Chinese Medicine,Department of Gastrointestinal Surgery
[2] Institute of Gastroenterology,Department of Gastrointestinal Surgery
[3] Sun Yat-Sen University,Department of Preventive Medicine and Medical Statistics, College of Fundamental Medical Science
[4] the Sixth Affiliated Hospital,undefined
[5] Sun Yat-sen University,undefined
[6] Key Laboratory of Tropical Disease Control (Sun Yat-sen University),undefined
[7] Ministry of Education,undefined
[8] Guangzhou,undefined
[9] Guangzhou University of Traditional Chinese Medicine,undefined