[1] St Elizabeth Hosp, Dept Surg, NL-5000 LC Tilburg, Netherlands
[2] Tilburg Univ, Dept Med Psychol, NL-5000 LE Tilburg, Netherlands
[3] St Elizabeth Hosp, Dept Med Psychol, NL-5000 LC Tilburg, Netherlands
[4] AMC, Emma Childrens Hosp, Dept Paediat Surg, NL-1100 DD Amsterdam, Netherlands
[5] Vrije Univ Amsterdam, Dept Paediat Surg, Med Ctr, NL-1007 MB Amsterdam, Netherlands
[6] Tilburg Univ, Ctr Res Psychol Somat Dis CoRPS, NL-5000 LE Tilburg, Netherlands