1 Centre for Research in Health Systems Performance, Department of Family Medicine, National University of Singapore, Singapore 119077; Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119077; World Organization of Family Doctors, Brussels, Belgium. Electronic address: jmvalderas@nus.edu.sg.
2 World Organization of Family Doctors, Brussels, Belgium.
3 Faculty of Public Health and Policy, London School of Hygiene & Tropical Medicine, London, UK.
4 Saw Swee Hock School of Public Health, National University of Singapore, Singapore 119077.
5 Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119077; Department of Obstetrics and Gynaecology, National University of Singapore, Singapore 119077.
6 Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119077; Department of Medicine, National University of Singapore, Singapore 119077.
7 Saw Swee Hock School of Public Health, National University of Singapore, Singapore 119077; Faculty of Public Health and Policy, London School of Hygiene & Tropical Medicine, London, UK.