Received: 27 April 2018
Accepted: 10 July 2018
First Online: 13 July 2018
Ethics approval and consent to participate
: The study was carried out in accordance with the ethical standards, Declarations of Helsinki. Approval was obtained from Institutional Review Board (IRB) at An-Najah National University in Palestine prior to the research conduction and the general police department approval was obtained. Confidentiality was assured by keeping the data in a safe place and by using codes instead of names. All the information were available for the research team only.
: Not applicable.
: The authors declare that they have no competing interests.
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