1. Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts (B.T.B., K.F.H.)
2. Aarhus University Hospital, Aarhus, Denmark (U.H., M.N.)
3. University of Iceland, Reykjavik, Iceland (K.E.)
4. Norwegian Institute of Public Health, Oslo, and University of Bergen, Bergen, Norway (A.E.)
5. Norwegian Institute of Public Health, Oslo, Norway (K.F., R.S.)
6. University of Turku, Turku, Finland, and Karolinska Institutet, Stockholm, Sweden (M.G., H.K., J.R.)
7. Harvard T.H. Chan School of Public Health, Boston, Massachusetts (S.H.)
8. National Institute for Health and Welfare, Helsinki, Finland (A.L.)
9. Karolinska Institutet, Stockholm, Sweden; National Institute for Health and Welfare, Helsinki, Finland; Brigham and Women's Hospital, Boston, Massachusetts (H.M.)
10. University of Iceland, Reykjavik, Iceland, and University of New South Wales, Sydney, New South Wales, Australia (H.Z.)