Text and Data Mining valid from 2019-02-20
Received: 7 October 2017
Accepted: 13 January 2019
First Online: 20 February 2019
Ethics approval and consent to participate
: The study protocol was approved by the ethics committee of the faculty of Medicine of Suez Zagazig University, 7 June, 2015, registration number is 2123.The purpose of the study was explained, and an informed written consent was taken before taking any data or doing any investigations.The participants were informed that their participation was voluntary and that they could withdraw from the study at any time without consequences.The participants were assured that all data will be considered confidential and will not be used outside this research. At the end of this study, records will be destroyed appropriately.
: All participants had signed an informed consent to participate and for the data to be published.
: The authors declare that they have no competing interests.
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