National University of Singapore, Department of Economics and Saw Swee Hock School of Public Health, Health Intervention and Technology Assessment Program, World Health Organization (WHO) - World Health Organization Southeast Asia Regional Office (WHO SEARO), London School of Economics and Political Science, National University of Singapore (NUS) - Saw Swee Hock School of Public Health (SSHSPH), National University of Singapore (NUS) - Saw Swee Hock School of Public Health (SSHSPH), Health Intervention and Technology Assessment Program and National University of Singapore (NUS) - Saw Swee Hock School of Public Health (SSHSPH)

National University of Singapore (NUS) - Duke-NUS Medical School, National University of Singapore (NUS) - Duke-NUS Medical School, affiliation not provided to SSRN, National University of Singapore (NUS), National University Singapore, National University of Singapore (NUS) - Saw Swee Hock School of Public Health, National University of Singapore (NUS) - Saw Swee Hock School of Public Health (SSHSPH) and National University of Singapore (NUS) - Duke-NUS Medical School