1. From the Department of Medicine (A.-K.W., O.S., S.C.), Clinical Epidemiology Unit, Karolinska Institutet, Stockholm, Sweden; Department of Women’s and Children’s Health (A.-K.W.), Uppsala University, Uppsala, Sweden; Department of Woman and Child Health (O.S.), Division of Obstetrics and Gynecology, Karolinska University Hospital and Institutet, Stockholm, Sweden.