Michiel Lammers1,2, Amir I A Ahmed1,2,3. 1. Department of Elderly, Vincent van Gogh Institute for Psychiatry, Venray, the Netherlands. 2. Department of Geriatric Medicine, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands. 3. Department of Pharmacology and Toxicology, Radboud University Nijmegen Medical Centre, Nijmegen, the Netherlands.