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Daniel Guenther, Stefan Schmidl, Till O Klatte, Harald K Widhalm, Mohamed Omar, Christian Krettek, Thorsten Gehrke, Daniel Kendoff, Carl Haasper 
World J Orthop 6(1):137-144. Published online Jan 18, 2015. doi: 10.5312/wjo.v6.i1.137
Observational Study
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