Article History
Received: 28 March 2018
Accepted: 7 November 2018
First Online: 12 November 2018
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with animals performed by any of the authors.
: All procedures performed in this study were in accordance with the ethical standards of the institutional research committee and with the 1964 Declaration of Helsinki and its later amendments.
: The study is a retrospective analysis of instrumental examinations carried out previously: For this reason, authors did not ask informed consent.