Funding for this research was provided by:
Cuban Ministry of Public Health
Text and Data Mining valid from 2019-03-04
Received: 8 October 2018
Accepted: 21 February 2019
First Online: 4 March 2019
: LVP was recipient of the Georg Foster award from the Alexander Von Humboldt foundation in 2013. LVP is the President of the Cuban Academy of Sciences; and RRL is an associated young to this Academy of Sciences.
: All procedures were in accordance with the declaration of Helsinki and the standards of the institutional Ethics Committee for Scientific Research from the CIRAH. All participants gave their written informed consent prior to the experiments.
: Not required for this paper.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.