[1] Kings Coll London, Sect Womens Mental Hlth, IOPPN, 16 De Crespigny Pk, London SE5 8AF, England
[2] Finnish Inst Hlth & Welf, Dept Publ Hlth & Welf, Helsinki, Finland
[3] Univ Helsinki, Dept Psychiat, Helsinki, Finland
[4] Helsinki Univ Cent Hosp, Helsinki, Finland
[5] Tampere Univ Hosp, Pediat Clin, Tampere, Finland
[6] Univ Tampere, Tampere Ctr Child Hlth Res, Tampere, Finland
[7] Tampere Univ Hosp, Tampere, Finland
[8] Univ Helsinki, Fac Med, Dept Psychiat, Helsinki, Finland
[9] Univ Helsinki, Fac Med, SleepWell Res Program, Helsinki, Finland
[10] Univ Helsinki, Pediat Res Ctr, Child Psychiat, Helsinki, Finland
[11] Helsinki Univ Hosp, Helsinki, Finland