[1] Univ Cologne, PMV Res Grp, Cologne, Germany
[2] Univ Cologne, Dept Child & Adolescent Psychiat Psychosomat & Ps, Cologne, Germany
[3] Sci Inst AOK, WIdO, Wissensch Inst AOK, Berlin, Germany
[4] Inst TK Benefit & Efficiency Hlth Care, WINEG, Wissensch Inst TK Nutzen & Effizienz Gesundheitsw, Hamburg, Germany