1. Department of Medicine, National University Hospital , 5 Lower Kent Ridge Road, Singapore 119074 , Singapore
2. Department of Medicine , Yong Loo Lin School of Medicine, , 10 Medical Dr, Singapore 117597 , Singapore
3. National University of Singapore , Yong Loo Lin School of Medicine, , 10 Medical Dr, Singapore 117597 , Singapore
4. Division of Infectious Diseases , Department of Medicine, , 5 Lower Kent Ridge Road, Singapore 119074 , Singapore
5. National University Hospital , Department of Medicine, , 5 Lower Kent Ridge Road, Singapore 119074 , Singapore
6. Fast and Chronic Programmes, Alexandra Hospital , 378 Alexandra Road, 159964 , Singapore
7. Division of Advanced Internal Medicine , Department of Medicine, , 5 Lower Kent Ridge Road, Singapore 119074 , Singapore
8. Division of Rheumatology , Department of Medicine, , 5 Lower Kent Ridge Road, Singapore 119074 , Singapore
9. Healthy Ageing Programme, Alexandra Hospital , 378 Alexandra Road, 159964 , Singapore
10. Division of Respiratory & Critical Care Medicine , Department of Medicine, , 1E Kent Ridge Road, NUHS Tower Block Level 10, 119074 , Singapore
11. National University Hospital , Department of Medicine, , 1E Kent Ridge Road, NUHS Tower Block Level 10, 119074 , Singapore