Funding for this research was provided by:
Ministero della Salute (RF-2011-02346770)
Received: 19 August 2020
Accepted: 30 November 2020
First Online: 7 January 2021
Compliance with ethical standards
: The authors declare that they have no competing interests.
: The study was approved by the local Ethical Committee of Pisa University Hospital in accordance with the code of Ethics of the World Medical Association (Declaration of Helsinki).
: Written informed consent was obtained prior to participation in the study and after an explanation of the protocol.