1. Research Division, Institute of Mental Health , 10 Buangkok View, Singapore 539747, Singapore
2. National Healthcare Group Polyclinics , 3 Fusionopolis Link , Singapore 138543, Singapore
3. Khoo Teck Puat Hospital, Diabetes Centre , 90 Yishun Central, Singapore 768828, Singapore
4. Saw Swee Hock School of Public Health, National University of Singapore , 12 Science Drive 2, Singapore 117549, Singapore
5. Lee Kong Chian School of Medicine, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore