1. Department of Gastroenterology and Hepatology, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore 308433, Singapore
2. Department of General Surgery, Sengkang General Hospital, 110 Sengkang East Way, Singapore 544886, Singapore
3. Department of Nutrition and Dietetics, Khoo Teck Puat Hospital, 90 Yishun Central, Singapore 768828, Singapore
4. Department of General Surgery, Tan Tock Seng Hospital, 11 Jalan Tan Tock Seng, Singapore 308433, Singapore
5. Department of Geriatric Medicine, Changi General Hospital, 2 Simei St 3, Singapore 529889, Singapore
6. SingHealth Duke-NUS Medicine Academic Clinical Programme, 8 College Road, Singapore 169857, Singapore
7. Yong Loo Lin School of Medicine, National University of Singapore, 10 Medical Drive, Singapore 117597, Singapore