1. Karolinska Institutet, Stockholm, Sweden, Örebro University Hospital, Örebro, Sweden, University of Nottingham, Nottingham, United Kingdom, and Columbia University College of Physicians and Surgeons, New York, New York (J.F.L.)
2. Karolinska Institutet, Stockholm, Sweden (M.N., J.S., O.S.)
3. Karolinska Institutet, Stockholm, Sweden; Centre of Registers Västra Götaland and University of Gothenburg, Gothenburg, Sweden (S.G., S.F.)
4. Centre of Registers Västra Götaland, Gothenburg, Sweden (A.S.)
5. Karolinska Institutet, Stockholm, Sweden, and Statens Serum Institut, Copenhagen, Denmark (B.P.)