1. Tan Tock Seng Hospital, National Health Group is with the High-Dependency Unit, , Singapore
2. Centre for Nursing Studies, Yong Loo Lin School of Medicine, National University of Singapore are with the Alice Lee , Singapore
3. Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore is with the , Singapore
4. Medical Intensive Care Unit, Tan Tock Seng Hospital, National Health Group is with the , Singapore
5. Shanghai Jiao Tong University, School of Nursing is with the , Shanghai, China
6. Faculty of Health Sciences, Hokkaido University is with the , Japan
7. NUSMED Healthy Longevity Translational Research Programme, National University of Singapore is with the , Singapore