Received: 6 August 2019
Accepted: 28 November 2019
First Online: 12 December 2019
Ethics approval and consent to participate
: The ethics committee of the Federal University of São Paulo approved the study (protocol no. 1860/10. The parents gave written consent to take part in the research. The committee evaluated the ethical aspects of the study in accordance with The World Medical Association’s Declaration of Helsinki. The study was explained in detail to the participants` parents. Parental written informed consent was obtained right before patient enrollment in all cases.
: Not applicable.
: The authors declare that they have no competing interests.