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Article History

Received: 27 May 2019

Accepted: 5 June 2019

First Online: 15 July 2019

Ethics approval and consent to participate

: The study was approved by the ethics review committee of King Abdulaziz University Hospital, reference number (179-18), its Chairman Prof. Hassan Alzahrani. The study was conducted according to the ethical guidelines conforming to the declaration of Helsinki, and patients’ parents/guardians consented to participate; therefore, a written consent was obtained.

: Not applicable

: The authors declare that they have no competing interests.