Affiliations

• ¹ Department of Gastroenterology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China.
• ² Shantou University Medical College, Shantou, Guangdong, China.
• ³ Department of Hematology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China.
• ⁴ Sepulveda Ambulatory Care Center, VA Greater Los Angeles Healthcare System, Los Angeles, California, USA chenhao@gdph.org.cn felix.leung@va.gov.
• ⁵ David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, USA.
• ⁶ Department of Gastroenterology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, China chenhao@gdph.org.cn felix.leung@va.gov.