1. Department of Public Health and Primary Care, Leiden University Medical Centre, Hippocratespad 21, 2333 RC Leiden, The Netherlands
2. Leyden Academy on Vitality and Ageing, Rijnsburgerweg 10, 2333 AA Leiden, The Netherlands
3. Buurtzorg Nederland, Head Office, Postbus 69, 7600 AB Almelo, The Netherlands