Article History
Received: 9 February 2022
Accepted: 22 March 2022
First Online: 7 April 2022
Compliance with ethical standards
:
: The authors declare no competing interests.
: This retrospective study approved by Ethics Committee of Canton Tessin, Switzerland. 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 present study was approved by the local ethical committee.
: Informed consent was obtained from all subjects involved in the study according to the Ethics Committee.