About the Authors

Karl Michaëlsson, Helena Olofsson, Sune Larsson, Hans Mallmin
Section of Orthopaedics, Department of Surgical Sciences, University Hospital, Uppsala, Sweden

Karl Michaëlsson, Karin Jensevik, Lars Berglund
Uppsala Clinical Research Center, University Hospital, Uppsala, Sweden

Bengt Vessby
Section of Geriatrics, Department of Public Health, University Hospital, Uppsala, Sweden

Håkan Melhus
Section of Clinical Pharmacology, Department of Medical Sciences, University Hospital, Uppsala, Sweden

Corresponding Author

Karl.Michaelsson@surgsci.uu.se

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Karl Michaëlsson, Helena Olofsson, and Håkan Melhus designed the study. Karl Michaëlsson, Bengt Vessby, and Hans Mallmin acquired the data. Karl Michaëlsson, Karin Jensevik, and Lars Berglund performed the statistical analysis. Karl Michaëlsson drafted the manuscript, which was critically revised by all coauthors.