Funding for this research was provided by:
Pontificia Universidad Católica del Ecuador (L13058, M13416)
National Institute of Allergy and Infectious Diseases (D43TW008261)
Text and Data Mining valid from 2019-07-26
Received: 4 February 2019
Accepted: 22 July 2019
First Online: 26 July 2019
Ethics approval and consent to participate
: The protocol was approved by the Ethical Review Committee of Pontificia Universidad Católica del Ecuador (approvals #: CBE-016-2013 and 20-11-14-01). Written informed consent was provided by study participants and/or their legal guardians.
: Not applicable.
: The authors declare that they have no competing interests.