Author contributions
NB
TC performed the clinical exams, entered data and drafted the manuscript; LB collected, processed, analyzed and interpreted the data and critically revised the manuscript; CN supervised data collection and monitored data quality control and critically revised the manuscript; NB collected, processed and entered data; AM analyzed and interpreted the data and drafted the manuscript; KS defined the research question, performed the surgery, and critically revised the manuscript; all authors approved the final draft of the manuscript and are accountable for all aspects of the work. All authors had full access to all data and take responsibility for the integrity of the data and the accuracy of the data analysis.