Received: 23 July 2019
Accepted: 20 March 2020
First Online: 16 April 2020
Ethics approval and consent to participate
: All data were analysed anonymously and confidentially, with approval by the Research Ethics Committee of Hospital das Clinicas of the University of Sao Paulo and received approval by CONEP (National Ethics Commission), Brazil. It was a retrospective in vitro study, thus, it was not possible to apply the consent to participate.
: Not applicable.
: The authors declare that they have no competing interests.