Funding for this research was provided by:
Received: 22 October 2019
Accepted: 17 February 2020
First Online: 28 February 2020
Ethics approval and consent to participate
: The study was performed at the IRCCS Istituto Ortopedico Rizzoli (Bologna, Italy) in accordance with the Local Ethical Committees approval and patient consent.
: The authors alone are responsible for the content and writing of the article.
: The authors declare that they have no competing interests.