[1] Univ Cincinnati, Coll Med, Dept Psychiat, Biol Psychiat Program, Cincinnati, OH 45267 USA
[2] Free Univ Brussels, Lab Psychiat Res, Brussels, Belgium
[3] Case Western Reserve Univ, Sch Med, Dept Psychiat, Mood Disorders Program, Cleveland, OH 44106 USA
[4] Rush Presbyterian St Lukes Med Ctr, Dept Psychiat, Chicago, IL 60612 USA
[5] Univ Texas, SW Med Ctr, Dept Psychiat, Dallas, TX USA
[6] Univ Aarhus, Hosp Psychiat, Aarhus, Denmark
[7] San Carlos Univ Hosp, Dept Psychiat, Madrid, Spain