Russo, Raffaele
Maiotti, Marco
Taverna, Ettore
Article History
Received: 28 October 2017
Accepted: 14 February 2018
First Online: 27 February 2018
Competing interests
: RR and MM have not conflict of interest. ET is a consultant for Smith and Nephew, but this had no influence on the project and we have no obligations to them.
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