About the Authors

Mattis Flyvholm Ranthe

mfrante@gmail.com

Affiliation Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark

Jonathan Aavang Petersen

Affiliation Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark

Henning Bundgaard

Affiliation The Heart Center, Unit for Inherited Cardiac Diseases, Copenhagen University Hospital, Copenhagen, Denmark

Jan Wohlfahrt

Affiliation Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark

Mads Melbye

Affiliation Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark

Heather A. Boyd

Affiliation Department of Epidemiology Research, Statens Serum Institut, Copenhagen, Denmark

Competing Interests

The authors have declared that no competing interests exist. However it should be mentioned that this study was designed and conducted at the Department of Epidemiology Research, Statens Serum Institut by the collective group of authors, lead by Dr. Ranthe in the period 2012-2013. Dr. Ranthe was employed at the Department from 2010-2013. At time of this submission, however Dr. Ranthe is an employee of Novo Nordisk A/S. Novo Nordisk A/S had no role in the design and conduct of the study; in the collection, management, analysis, and interpretation of the data; or in the preparation, review, or approval of the manuscript. None of the remaining authors have any competing interests or financial disclosures to declare. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Analyzed the data: MFR. Wrote the paper: MFR JAP HB JW MM HAB. Obtained permissions from national data protection agency and national board of health: MM.