About the Authors
Section of Orthopaedics, Department of Surgical Sciences, University Hospital, Uppsala, Sweden
Uppsala Clinical Research Center, University Hospital, Uppsala, Sweden
Section of Geriatrics, Department of Public Health, University Hospital, Uppsala, Sweden
Section of Clinical Pharmacology, Department of Medical Sciences, University Hospital, Uppsala, Sweden
The authors have declared that no competing interests exist.
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.