About the Authors

Dorthe Almind Pedersen

dapedersen@health.sdu.dk

Affiliation Epidemiology, Biostatistics and Biodemography, Department of Public Health, University of Southern Denmark, Odense C, Denmark

George L. Wehby

Affiliation Department of Health Management and Policy, University of Iowa College of Public Health, Iowa City, United States of America

Jeffrey C. Murray

Affiliation Department of Pediatrics, University of Iowa College of Medicine, Iowa City, United States of America

Kaare Christensen

Affiliations Epidemiology, Biostatistics and Biodemography, Department of Public Health, University of Southern Denmark, Odense C, Denmark, Department of Clinical Genetics, Department of Biochemistry and Pharmacology, Odense University Hospital, Odense C, Denmark

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: DAP. Wrote the paper: DAP GLW JCM KC. Contribution to study design: DAP GLW JCM KC.