Disclosure: There are no conflicts of interest to disclose.
Author Contributions: All authors were involved in drafting this article or revising it critically for important intellectual content, and all authors approved the final version to be published. Dr Wluka had full access to all of the data in this study and took responsibility for the integrity of the data and the accuracy of the data analysis.
Study conception and design: Butterworth, Menz, Urquhart, Cicuttini, Wluka, Strauss, Proietto, Dixon, and Jones were involved in study conception and design.
Acquisition of data: Butterworth, Urquhart, Cicuttini, Wluka, Strauss, and Proietto were involved in data acquisition.
Analysis and interpretation of data: Butterworth, Wluka, Urquhart, Cicuttini, Menz, Strauss, Jones, Proietto, and Landorf were involved in data analysis and interpretation.