1. Section of Geriatrics Department of Internal Medicine School of Medicine Yale University New Haven Connecticut USA
2. Section of Geriatric Medicine Department of Internal Medicine Amsterdam UMC Amsterdam Public Health Research Institute University of Amsterdam Amsterdam the Netherlands
3. Department of Statistics and Actuarial Science University of Waterloo Waterloo Canada
4. Geriatrics and Extended Care VA Connecticut Healthcare System West Haven Connecticut USA
5. Department of Family Medicine and Public Health School of Medicine University of California San Diego San Diego California USA
6. Department of Biostatistics Yale School of Public Health New Haven Connecticut USA