1. Changfa Xia, PhD, Office of Cancer Screening, National Cancer Centre/National Clinical Research Centre for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; He Li, PhD, Office of National Cancer Regional Medical Centre in Liaoning Province, The First Affiliated Hospital of China Medical University, Shenyang, China; and Wanqing Chen, MD, PhD, Office of Cancer Screening, National Cancer Centre/National Clinical Research Centre for Cancer/Cancer...