Funding for this research was provided by:
Sapienza Università di Roma (reseach fund 2015)
Text and Data Mining valid from 2019-03-05
Received: 17 November 2018
Accepted: 14 February 2019
First Online: 5 March 2019
Compliance with ethical standards
: There are neither competing conflicts of interest in connection with the submitted article, nor industry relationship; so authors deny any competing financial interest related to this study.
: Written informed consent was obtained for publication. The bioethical committee of Policlinico Umberto I, Rome, Italy, approved the study.