Sadaka, Mohamed A.
Etman, Waleed
Ahmed, Walid
Kandil, Saeed
Eltahan, Salah
Article History
Received: 25 May 2019
Accepted: 16 July 2019
First Online: 5 September 2019
Ethics approval and consent to participate
: The study protocol was submitted to and approved by our institutional ethics committee in the Faculty of Medicine, Alexandria University. An informed written consent was obtained from all study participants
: Not applicable
: The authors declare that they have no competing interests.