About the Authors

Johanna E. Torfadottir

jet@hi.is

Affiliations Centre of Public Health Sciences, University of Iceland, Reykjavik, Iceland, Educational Research Institute, School of Education, University of Iceland, Reykjavik, Iceland

Unnur A. Valdimarsdottir

Affiliations Centre of Public Health Sciences, University of Iceland, Reykjavik, Iceland, Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America

Lorelei A. Mucci

Affiliations Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America, Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, United States of America

Julie L. Kasperzyk

Affiliations Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America, Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, United States of America

Katja Fall

Affiliations Centre of Public Health Sciences, University of Iceland, Reykjavik, Iceland, Örebro University Hospital, Örebro, Sweden

Laufey Tryggvadottir

Affiliations The Icelandic Cancer Registry, Reykjavik, Iceland, Faculty of Medicine, University of Iceland, Reykjavik, Iceland

Thor Aspelund

Affiliations Centre of Public Health Sciences, University of Iceland, Reykjavik, Iceland, The Icelandic Heart Association, Kópavogur, Iceland

Orn Olafsson

Affiliation Centre of Public Health Sciences, University of Iceland, Reykjavik, Iceland

Tamara B. Harris

Affiliation Laboratory of Epidemiology, Demography, and Biometry, Intramural Research Program, National Institute on Aging, Bethesda, Maryland, United States of America

Eirikur Jonsson

Affiliation Department of Urology, Landspitali – The National University Hospital of Iceland, Reykjavik, Iceland

Hrafn Tulinius

Affiliations The Icelandic Cancer Registry, Reykjavik, Iceland, Faculty of Medicine, University of Iceland, Reykjavik, Iceland

Vilmundur Gudnason

Affiliations The Icelandic Heart Association, Kópavogur, Iceland, Faculty of Medicine, University of Iceland, Reykjavik, Iceland

Hans-Olov Adami

Affiliations Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America, Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden

Meir Stampfer

Affiliations Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America, Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, United States of America

Laufey Steingrimsdottir

Affiliation Unit for Nutrition Research, Landspitali University Hospital and Faculty of Food Science and Nutrition, School of Health Sciences, University of Iceland, Reykjavik, Iceland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Responsible for the analyzing of the data and the development of the first draft of the manuscript: JET. Provided essential materials for the study: VG TBH LT LS EJ. Designed the study: JET UAV LM MS LS KF. Contributed to the writing of the manuscript, to interpretation of the results and had primary responsibility for the final content: JET UAV JLK LM HOA MS LS. Read and approved final manuscripts: JET UAV LM JLK KF LT TA OO TBH EJ HT VG HOA MS LS. Conceived and designed the experiments: JET UAV LM MS LS. Analyzed the data: JET. Contributed reagents/materials/analysis tools: VG TBH LT LS EJ TA OO HT. Wrote the paper: JET UAV JLK LM HOA LS.