Affiliation: | 1. Centre for Population Health Sciences, Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore Singapore ; 2. Vascular Surgery Service, Department of General Surgery, Tan Tock Seng Hospital, Singapore Singapore ; 3. School of Social Sciences, Nanyang Technological University, Singapore Singapore ; 4. Department of Primary Care and Public Health, School of Public Health, Imperial College London, London UK |