1. Janssen Pharmaceutical Companies of Johnson & Johnson, Solna, Sweden (Leone, Leval); Department of Medical Epidemiology and Biostatistics (Leone, Kuja-Halkola, Leval, Butwicka, Zhang, Liu, Larsson, Bergen) and Department of Molecular Medicine and Surgery (Skov), Karolinska Institutet, Solna, Sweden; Child and Adolescent Psychiatry Stockholm, Stockholm Health Care Services, Region Stockholm, Sweden (Butwicka); Department of Child Psychiatry, Medical University of Warsaw, Warsaw (Butwicka); Department of...