[1] Univ Utrecht, Dept Hlth Psychol, NL-3508 TC Utrecht, Netherlands
[2] Univ Utrecht, Dept Methodol & Stat, NL-3508 TC Utrecht, Netherlands
[3] Tilburg Univ, Dept Psychol & Hlth, CoRPS, Ctr Res Psychol Somat Dis, NL-5000 LE Tilburg, Netherlands
[4] Univ Utrecht, Dept Hlth Psychol, NL-3508 TC Utrecht, Netherlands
[5] Univ Utrecht, Med Ctr, Dept Rheumatol & Clin Immunol, NL-3508 TC Utrecht, Netherlands