About the Authors

Tze Pin Ng

pcmngtp@nus.edu.sg

Affiliations Gerontological Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore, Department of Psychological Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore

Mathew Niti

Affiliations Gerontological Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore, Health Service Research and Evaluation, Ministry of Health, Singapore, Singapore

Keng Bee Yap

Affiliations Gerontological Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore, Alexandra Hospital, Singapore, Singapore

Wan Cheng Tan

Affiliations Gerontological Research Programme, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore, University of British Columbia James Hogg Research Centre, Heart Lung Institute, St Paul's Hospital, Vancouver, Canada

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TPN. Performed the experiments: TPN MN KBY WCT. Analyzed the data: TPN. Wrote the paper: TPN MN KBY WCT.