1. Guangzhou Institute of Oncology, Affiliated Cancer Hospital & Institute of Guangzhou Medical University, Guangzhou, China
2. Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China
3. Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
4. School of Public Health, Xi’an Medical University, Xi’an, China
5. Department of Cancer Biology and Life Sciences, College of Medicine, University of Toledo, Toledo, OH, USA