Abdel-Rahman, Omar http://orcid.org/0000-0002-5117-2502
Article History
Received: 10 April 2018
Accepted: 14 July 2018
First Online: 1 August 2018
Compliance with ethical guidelines
:
: O. Abdel-Rahman declares that he has no competing interests.
: This article does not contain any studies with human participants or animals performed by any of the authors.