1 Centre on Aging and Mobility, University Hospital Zurich, Zurich, Switzerland; University Clinic for Acute Geriatric Care, City Hospital Waid, 8037 Zurich, Switzerland. Electronic address: [email protected].
2 Department of Medicine and Palliative and Advanced Illness Research Center, University of Pennsylvania, Philadelphia, PA, USA.
3 Department of Geriatric Psychiatry, University Hospital of Psychiatry, Zurich, Switzerland; Dynamics of Healthy Aging University Research Priority Programme, University of Zurich, Zurich, Switzerland.