van Dalen-Kok Annelore H, Pieper Marjoleine, de Waal Margot, Lukas Albert, Husebo Bettina S, Achterberg Wilco P
Department of Public Health and Primary Care, Leiden University Medical Centre, Hippocratespad 21 Post zone V0-P, PO Box 9600, Leiden, RC, 2300, The Netherlands.
Department of General Practice & Elderly Care Medicine, VU University Medical Centre Amsterdam, van der Boechorststraat 7, Amsterdam, BT, 1081, The Netherlands.
BMC Geriatr. 2015 Sep 9;15:109. doi: 10.1186/s12877-015-0085-1.