[1] Hasselt Univ, Hasselt, Belgium
[2] Katholieke Univ Leuven, Fac Med, Dept Publ Hlth & Primary Care, Belgian Ctr Evidence Based Med,Cochrane Belgium, Leuven, Belgium
[3] Katholieke Univ Leuven, Acad Ctr Gen Practice Achc, Fac Med, Leuven, Belgium
[4] Belgian Ctr Evidence Based Med Cebam, Leuven, Belgium
[5] Hasselt Univ, Dept Med Oncol, Jessa Hosp, Fac Med & Life Sci, Hasselt, Belgium
[6] Free Univ Brussels, Dept Expt & Appl Psychol, Fac Psychol & Educ Sci, Brussels, Belgium
[7] Hasselt Univ, Fac Med & Life Sci, Hasselt, Belgium
[8] Az Delta Hosp, Roeselare, Belgium
[9] Univ Ghent, Univ Ctr Nursing & Midwifery, Ghent, Belgium