Received: 6 January 2021
Accepted: 12 May 2021
First Online: 25 May 2021
: The ethical committee of Osservatorio Epidemiologico Regionale approved this study. The study follows the principles of the World Medical Association Declaration of Helsinki, and does not involve any experiments on humans or human samples, nor research on identifiable human material and data. Written informed consent to participate in this study was obtained from the participants.
: Not applicable.
: The authors have no competing interests to declare.