1. Max Planck Institute for Demographic Research, Rostock, Germany;
2. Internal Medicine/Geriatrics – Sealy Center on Aging, The University of Texas Medical Branch, Galveston, TX, USA;
3. Sealy Center on Aging, WHO/PAHO Collaborating Center on Aging and Health, The University of Texas Medical Branch, Galveston, TX, USA;
4. P&S Kempner Distinguished Professor in Health Disparities, Department of Preventive Medicine and Community Health, Director, WHO/PAHO Collaborating Center on Aging and Health, The University of Texas Medical Branch, Galveston, TX, USA