Received: 13 June 2018
Accepted: 8 December 2018
First Online: 18 January 2019
Ethics approval and consent to participate
: Study protocol was approved with the approval number 0043331 on 24th March 2018 by the ethics committee of the coordinating unit (Comitato Etico Interaziendale – AOU Città della Salute e della Scienza di Torino; phone: + 39.011.6336547; email: firstname.lastname@example.org).The study protocol will be subsequently submitted to the ethics committees of each participating unit.
: Not applicable.
: The authors declare that they have no competing interests.
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