About the Authors

Johan H. Andersen

joande@rm.dk

Affiliation Danish Ramazzini Centre, Department of Occupational Medicine, Regional Hospital Herning, Herning, Denmark,

Nils Fallentin

Affiliation Center for Physical Ergonomics, Liberty Mutual Research Institute for Safety, Hopkinton, Massachusetts, United States of America

Jane F. Thomsen

Affiliation Department of Occupational and Environmental Medicine, Copenhagen University Hospital Bispebjerg, Copenhagen, Denmark

Sigurd Mikkelsen

Affiliation Department of Occupational and Environmental Medicine, Copenhagen University Hospital Bispebjerg, Copenhagen, Denmark

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: JHA NF. Wrote the paper: JHA NF JFT SM. Conceived and designed the study: JHA NF JFT SM. Performed the search: JHA JKA NF. Provided data form: JHA.