[1] Chinese Univ Hong Kong, Dept Clin Oncol, Hong Kong, Peoples R China
[2] Merck & Co Inc, Ctr Observat & Real World Evidence, N Wales, PA USA
[3] Univ Hong Kong, Dept Family Med & Primary Care, Hong Kong, Peoples R China
[4] Merck & Co Inc, Ctr Observat & Real World Evidence, Rahway, NJ 07065 USA
[5] Merck Sharp & Dohme Ltd, Hong Kong, Peoples R China
[6] Merck Sharp & Dohme Asia Pacific, Singapore, Singapore