About the Authors

Jon Jarløv Rasmussen

jon.ras@dadlnet.dk

Affiliation Department of Internal Medicine, Copenhagen University Hospital, Herlev, Denmark

Christian Selmer

Affiliation Department of Internal Medicine, Copenhagen University Hospital, Herlev, Denmark

Peter Busch Østergren

Affiliation Department of Urology, Copenhagen University Hospital, Herlev, Denmark

Karen Boje Pedersen

Affiliation Department of Internal Medicine, Copenhagen University Hospital, Slagelse, Denmark

Morten Schou

Affiliation Department of Cardiology, Copenhagen University Hospitals, Herlev and Gentofte, Denmark

Finn Gustafsson

Affiliation Department of Cardiology, the Heart Centre, Rigshospitalet, Copenhagen, Denmark

Jens Faber

Affiliation Department of Internal Medicine, Copenhagen University Hospital, Herlev, Denmark

Anders Juul

Affiliation Department of Growth and Reproduction, Rigshospitalet, University of Copenhagen, Denmark

Caroline Kistorp

Affiliation Department of Internal Medicine, Copenhagen University Hospital, Herlev, Denmark

Competing Interests

Jon Jarløv Rasmussen and Caroline Kistorp have received unrestricted research grants from ‘AntiDoping Denmark’. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials. ‘AntiDoping Denmark’ had no role in preparation of the study, data collection and analysis, preparation of the manuscript or decision to publish the final version of the manuscript

Author Contributions

Conceptualization: JJR CK. Formal analysis: JJR. Funding acquisition: JJR CK. Investigation: JJR. Methodology: JJR CK PBØ CS FG MS. Project administration: JJR CK. Resources: CK JF AJ PBØ KBP. Supervision: CK MS FG CS. Visualization: JJR CK PBØ AJ JF CS FG MS KBP. Writing - original draft: JJR CK. Writing - review & editing: JJR CK PBØ AJ JF CS FG MS KBP.