[1] Department of General Internal Medicine,
[2] University Hospital Gasthuisberg,undefined
[3] Leuven,undefined
[4] Department of Geriatric Medicine,undefined
[5] Department of Thoracic and Vascular Surgery,undefined
[6] Ziekenhuis Oost-Limburg,undefined
[7] Campus St-Jan,undefined
[8] Genk,undefined
[9] Belgium,undefined