Received: 27 July 2018
Accepted: 24 July 2019
First Online: 7 August 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Ethics Committee (N° 4065/AO/17) and performed in accordance with the ethical standards of the 1964 Declaration of Helsinki as revised in 2000 and those of Good Clinical Practice. Consent to participate is not required due to the retrospective nature of this study.
: All subjects participating in this study received a thorough explanation of the risks and benefits of inclusion and gave their oral and written informed consent to publish the data.
: The corresponding author, Carlo Biz, is a member of the Editorial Board of BMC Musculoskeletal Disorders. The remaining authors declare that they have no conflict of interests related to the publication of this manuscript, and they have not received benefits or financial funds in support of this study.