Deeg Dorly J H, Wahl Hans-Werner
VU University Medical Center, Van der Boechorststraat 7, 1081 BT Amsterdam, The Netherlands.
Institute of Psychology, Department of Psychological Ageing Research, University of Heidelberg, Bergheimer Strasse 20, 69115 Heidelberg, Germany.
Eur J Ageing. 2008 Feb 16;5(1):1-3. doi: 10.1007/s10433-008-0075-7. eCollection 2008 Mar.