Received: 19 July 2017
Accepted: 2 February 2018
First Online: 7 February 2018
Ethics approval and consent to participate
: Patients included in the study were asked to give verbal consent based on the approval obtained from Institutional Review Board (IRB) of An-Najah National University. Verabl consent was obtained from all participants after giving them full information about the project and assured them the privacy of the information and data obtained.
: Not applicable
: The authors declare that they have no competing interests.
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