Text and Data Mining valid from 2019-10-16
Received: 13 March 2019
Revised: 15 September 2019
Accepted: 16 September 2019
First Online: 16 October 2019
Compliance with ethical guidelines
: M. Ibrahim and A. M. Elnabtity declare that they have no competing interests.
: All procedures performed in studies involving human participants or on human tissue were in accordance with the ethical standards of the institutional and/or national research committee and with the 1975 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent was obtained from all individual participants included in the study.