[1] Neuropsychiat Res Inst, Fargo, ND USA
[2] Univ N Dakota, Sch Med & Hlth Sci, Grand Forks, ND 58201 USA
[3] Univ Calgary, Dept Psychiat & Community Hlth Sci, Calgary, AB, Canada
[4] Hosp Galdakao Usansolo, Res Unit, CIBER Epidemiol & Publ Hlth, Vizcaya, Spain
[5] Univ Sydney, Sydney, NSW 2006, Australia
[6] Royal N Shore Hosp, Northside Clin, Sydney, NSW, Australia