Affiliation: | 1. Department of Genetics, Environment and Mental Health, Norwegian Institute of Public Health, , Oslo, Norway;2. Department of Psychiatry, Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, , Richmond, VA, USA;3. Department of Human and Molecular Genetics, Virginia Institute for Psychiatric and Behavioral Genetics, Virginia Commonwealth University, , Richmond, VA, USA;4. Institute of Psychiatry, University of Oslo, , Oslo, Norway |