Received: 24 April 2019
Accepted: 12 November 2019
First Online: 29 November 2019
Ethics approval and consent to participate
: The study was approved by the Local Ethics Committee and authorization for the use of anonymized data was obtained from each patient involved. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.The Ethics Committee of Provincia di Bergamo approved the study with the n 1203/2013.
: “Not applicable”.
: The authors declare that they have no competing interests.