About the Authors

Jessica E. Miller

jemille@ucla.edu

Affiliation Department of Epidemiology, School of Public Health, University of California Los Angeles, Los Angeles, California, United States of America

Lars Henning Pedersen

Affiliations Department of Obstetrics and Gynecology, Institute of Clinical Medicine, Aarhus University Hospital, Aarhus, Denmark, Department of Epidemiology, Institute of Public Health, Aarhus University, Aarhus, Denmark

Mogens Vestergaard

Affiliation Research Unit for General Practice and Department of General Practice, University of Aarhus, Aarhus, Denmark

Jørn Olsen

Affiliations Department of Epidemiology, School of Public Health, University of California Los Angeles, Los Angeles, California, United States of America, Department of Epidemiology, Institute of Public Health, Aarhus University, Aarhus, Denmark

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JEM LHP JO. Analyzed the data: JEM. Wrote the paper: JEM LHP MV JO. Interpretation of data: JEM LHP MV JO. Revisions of the manuscript and approval of the final manuscript: LP JO MV.