Received: 26 April 2020
Revised: 8 July 2020
Accepted: 10 July 2020
First Online: 16 July 2020
Compliance with ethical standards
: On behalf of all authors, the corresponding author states that there is no conflict of interest.
: This study was approved by the Ethical standards Committee of the AOU Careggi of Florence, Italy, and performed according to the ethical standards of Declaration of Helsinki (1964) and its later amendments. The surrogate decision-makers of the patients enrolled in the study provided their written informed consent.
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