1. University of Glasgow; Institute of Cardiovascular and Medical Sciences; New Lister Building Glasgow Royal Infirmary Glasgow UK G4 0SF
2. Memorial University of Newfoundland; Faculty of Medicine; St. John's Canada
3. University of Oxford; Nuffield Department of Population Health; Oxford UK
4. Julius Center for Health Sciences and Primary Care / University Medical Center Utrecht; Dutch Cochrane Centre; Room Str. 6.127 P.O. Box 85500 Utrecht Netherlands 3508 GA
5. Section of Geriatrics, Academic Medical Center, University of Amsterdam; Department of Internal Medicine; Amsterdam Netherlands
6. Gelre Hospitals; Department of Geriatric Medicine; Apeldoorn Netherlands