[1] Institute of Medical Biometry and Statistics,Section of Health Care Research and Rehabilitation Research
[2] Faculty of Medicine and Medical Center - University of Freiburg,Department of Medical Psychology
[3] University Medical Center Hamburg-Eppendorf,Center for Geriatric Medicine and Gerontology Freiburg
[4] Institute for Evidence in Medicine (for Cochrane Germany Foundation),Center for Geriatric Medicine and Gerontology Freiburg
[5] Faculty of Medicine and Medical Center - University of Freiburg,undefined
[6] Faculty of Medicine and Medical Center - University of Freiburg,undefined