Lucchetti, D.
Litta, F.
Ratto, C.
Sgambato, A.
Article History
Received: 21 October 2018
Accepted: 8 November 2018
First Online: 16 November 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This letter is not reporting any clinical series involving patients. So that, the approval of the Ethical Committee has been not required
: For this type of study formal consent is not required.