ผู้เขียน: Bee Choo Tai

Bee-Choo Tai, Saw Swee Hock School of Public Health, National University of Singapore, and National University Health System; and Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore David Machin, Medical Statistics Unit, School of Health and Related Sciences, University of Sheffield; and Cancer Studies, Faculty of Medicine, University of Leicester, UK