[1] Hosp Psychiat, Inst Basic Psychiat Res, Dept Psychiat Demog, DK-8240 Risskov, Denmark
[2] Hosp Psychiat, Dept Biol Psychiat, DK-8240 Risskov, Denmark
[3] Natl Hosp, Dept Psychiat, Torshavn, Faroe Islands, Denmark
[4] Odense Univ Hosp, Dept Clin Biochem & Genet, DK-5000 Odense, Denmark
[5] Univ Copenhagen Hosp, DK-2100 Copenhagen, Denmark