1. From the Clinical Epidemiology Unit, Department of Medicine Solna (A.E.B., S.C., J.F.L.), Department of Women's and Children's Health (A.E.B.), and Department of Medical Epidemiology and Biostatistics (E.I.), Karolinska Institutet, Sweden; Cardiology Department, Kaiser Permanente, Honolulu, HI (N.I.P.); Department of Pediatrics, Örebro University Hospital, Örebro, Sweden (J.F.L.).