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Article History

Received: 19 April 2018

Accepted: 19 December 2018

First Online: 29 December 2018

Ethics approval and consent to participate

: The study was approved by the Ethics Committees of Istituto Ortopedico Rizzoli n.0000393, 12/01/2018). Where possible the patients were informed of the study objectives and provided written consent.

: Participants consented to publication of the data they provided when signing the consent form.

: The authors declare that they have no competing interests.

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