Received: 18 September 2019
Accepted: 6 April 2020
First Online: 20 April 2020
Ethics approval and consent to participate
: Written consent to participate was obtained from the parents of patients. Additionally, written assent was obtained from those participants older than 8 years of age. This decision was supported and approved by the Local Committee of Bioethics and Research of the Pediatrics Hospital National Medical Center “Siglo XXI”.
: This is an original work, neither published, accepted or submitted for publication elsewhere. If the article is accepted, we transfer the copyright to the journal.
: The authors declare that there is no conflict of interest.