[1] Maastricht Univ, Dept Anat & Embryol, NL-6200 MD Maastricht, Netherlands
[2] Maastricht Univ, Dept Gen Practice, NL-6200 MD Maastricht, Netherlands
[3] Maastricht Univ, Dept Clin Psychol Sci, NL-6200 MD Maastricht, Netherlands
[4] Maastricht Univ, Expt Psychopathol Res Inst, NL-6200 MD Maastricht, Netherlands
[5] Univ Hosp Maastricht, Pain Management & Res Ctr, Maastricht, Netherlands
[6] Maastricht Univ, Care & Publ Hlth Res Inst, NL-6200 MD Maastricht, Netherlands
[7] Dutch Coll Gen Practitioners, Dept Guideline Dev & Sci, Utrecht, Netherlands