Received: 1 October 2018
Accepted: 21 December 2018
First Online: 24 January 2019
Ethics approval and consent to participate
: All experimental procedures and individual written informed consent, obtained from all donors, were reviewed and approved by the Comité Nacional de Bioética de la Investigación of Panama, by the Western Institutional Review Board, Olympia, Washington (USA) and by the Ethics Committee for Clinical Experimentation of the University of Pavia, Board minutes of October 5th, 2010.
: Not applicable.
: The authors declare that they have no competing interests.
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