Funding for this research was provided by:
Consejo Nacional de Ciencia y Tecnología, Guatemala (CONACyT SALUD-2017-01-289725)
Text and Data Mining valid from 2019-09-13
Received: 14 May 2019
Accepted: 30 August 2019
First Online: 13 September 2019
Ethics approval and consent to participate
: This study was approved by the Institutional Review Board of the National Institute of Respiratory Diseases (INER) (registry: DHHS IORG0003948; CONBIOETICA-09-CEI-003-20160427) in Mexico City (project code: B26-09), and was conducted according to the principles of the Declaration of Helsinki. All participants gave written informed consent before blood sample donation.
: Not applicable.
: The authors declare that they have no competing interests.