1. Department of Geriatrics, University Hospital Zurich, Switzerland; Centre on Aging and Mobility, University of Zurich, Switzerland
2. Zurich Geriatric Services and Nursing Homes, Zurich, Switzerland
3. Centre on Aging and Mobility, University of Zurich, Switzerland; Department of Internal Medicine, University Hospital Zurich, Switzerland
4. Department of Geriatrics, University Hospital Zurich, Switzerland; Centre on Aging and Mobility, University of Zurich, Switzerland; University Clinic for Acute Geriatric Care, Waid City Hospital, Zurich, Switzerland