Akl, Mohamed Farouk
Ibrahem, Mohamed Awad
Khater, Ashraf
El-zahaf, Eman
Farag, Kamel
Abdallah, Heba
Article History
Received: 11 January 2018
Accepted: 3 April 2018
First Online: 23 May 2018
Compliance with Ethical Standards
: This work was carried out in the period from January 2010 until June 2016 according to the guidelines of the Declaration of Helsinki and it was approved by the local institutional ethical committee review board (Code: R/17.07.51).
: The authors declare that they have no conflict of interest.