Text and Data Mining valid from 2019-08-01
Received: 23 June 2019
Accepted: 15 July 2019
First Online: 1 August 2019
Ethics approval and consent to participate
: The study was done after obtaining approval from the ethical committee of the National Research Centre, Cairo, Egypt (registration number is 16–207).
: Not applicable for this study.
: The authors declare that they have no competing interests.
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