1. Department of Medical Epidemiology and Biostatistics (Nguyen, Kowalec, Pasman, Larsson, Lichtenstein, Sullivan, Kuja-Halkola, Lu) and Department of Global Public Health (Nguyen, Dalman, Lu), Karolinska Institutet, Stockholm; College of Pharmacy, University of Manitoba, Winnipeg, Canada (Kowalec); School of Medical Sciences, Örebro University, Örebro, Sweden (Larsson); Departments of Genetics and Psychiatry, University of North Carolina, Chapel Hill (Sullivan).