1 Division of Cancer Control and Population Sciences, U.S. National Cancer Institute, 9609 Medical Center Drive, Room 4E344, Rockville, MD 20850, United States.
2 Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.
3 Office of Communication and Public Liaison, U.S. National Cancer Institute, United States.
4 Biometry Research Group, Division of Cancer Prevention, U.S. National Cancer Institute, Rockville, United States.
5 Division of Cancer Prevention, U.S. National Cancer Institute, Rockville, United States.
6 Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.