Nat Commun 2014 Sep 4;5:4757. Epub 2014 Sep 4.
1] Department of Psychiatry, University of North Carolina, Chapel Hill, North Carolina 27599, USA [2] Department of Genetics, University of North Carolina, Chapel Hill, North Carolina 27599, USA [3] Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, SE-171 77 Stockholm, Sweden [4].