Text and Data Mining valid from 2019-12-01
Received: 26 September 2019
Accepted: 13 November 2019
First Online: 16 December 2019
Ethics approval and consent to participate
: This study was approved by the Research Ethics Committee of the Faculty of Medicine at Tanta University in Egypt; Reference Number of approval: <b>31804/10/17</b>. All patients or guardians of the patients included in this study gave written informed consent to participate in this research.
: All parents or guardians of the patients included in this research gave written informed consent to publish the data contained within this study. The authors grant the publisher the consent for publication of this work.
: The authors declare that they have no competing interests.