aUniversity of Twente, Enschede, The Netherlands
bRoessingh Rehabilitation Centre, Enschede, The Netherlands
*Corresponding author. Address: University of Twente, Department of Psychology and Communication of Health and Risk, Citadel, Room 402, Postbus 217, 7500 AE Enschede, The Netherlands. Tel.: +31 53 489 6071; fax: +31 53 489 2388.
E-mail:[email protected]
Submitted August 31, 2009; revised August 23, 2010; accepted November 2, 2010.