About the Authors

Chun S. Wu

cw@soci.au.dk

Affiliation Department of Public Health, Aarhus University, Aarhus, Denmark

Lars H. Pedersen

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

Jessica E. Miller

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

Yuelian Sun

Affiliation Department of Public Health, Aarhus University, Aarhus, Denmark

Elani Streja

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

Peter Uldall

Affiliations The Cerebral Palsy Registry in Denmark, National Institute of Public Health, University of Southern Denmark, Odense, Denmark, Paediatric Clinic, The Juliane Marie Centre, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark

Jørn Olsen

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

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceptualized the study: JO. Contributed to the study design: CSW LHP JEM YS ES PU JO. Drafted the manuscript: CSW. Contributed to the interpretation of the study: CSW LHP JEM YS ES PU JO. Analyzed the data: CSW. Wrote the paper: CSW LHP JEM YS ES PU JO.