Funding for this research was provided by:
Università degli Studi di Genova (not available)
Text and Data Mining valid from 2019-02-07
Received: 23 November 2018
Accepted: 24 January 2019
First Online: 7 February 2019
Compliance with Ethical Standard
: The experimental procedures were in accordance with the European legislation (European Communities Council Directive of 24 November 1986, 86/609/EEC) and the ARRIVE guidelines, and they were approved by the Italian Ministry of Health (DDL 26/2014 and previous legislation; protocol number no. 50/2011-B).
: The authors declare that they have no competing interests.