1. National Central Cancer Registry, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
2. Department of Epidemiology and Biostatistics, School of Public Health, Xi’an Jiaotong University Health Science Center, Xi’an, China
3. Promegene Institute, Shenzhen, China
4. Department of Endoscopy, Cancer Institute/Hospital of Linzhou, Linzhou, China