Received: 17 June 2019
Accepted: 5 August 2019
First Online: 6 September 2019
Ethics approval and consent to participate
: The study was conducted in accordance with the ethical standards of the Helsinki Declaration of 1964 as revised in 2008, and the study protocol gained approval from the local Ethical Committee of the Pediatric Department, Faculty of Medicine, Ain Shams University, REC-FAMSU (RHDIRB2019060201), Cairo, Egypt. This article does not contain any studies with animals performed by any of the authors.Written informed consent was obtained from the caregivers of enrolled children before enrollment in the study, with preservation of patients’ anonymity using documents and methods approved by the ethical review committee of the Faculty of Medicine, Ain-Shams University.
: Not applicable.
: The authors declare that they have no competing interests.