Retraction Note to: Journal of Orthopaedic Surgery and Research (2020) 15:19 https://doi.org/10.1186/s13018-019-1496-z
The Editor-in-Chief has retracted this article at the request of corresponding author Teng Ma. Following publication, it was found that five studies included in this systematic did not meet the inclusion criteria. The results of this review article are therefore unreliable. The authors have not responded to correspondence regarding this retraction notice.
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