Received: 8 April 2019
Accepted: 24 December 2019
First Online: 6 January 2020
Ethics approval and consent to participate
: The ethical approval of the present study was obtained from the Ethics Committee of Hawler Medical University (registration number: 9 in 16/3/2016). The verbal consents were taken from the all patients prior to the study recruitment after explaining the purposes and procedure of the study and it mentioned in the special form requested by the Ethics Committee. Confidentiality and anonymity of all participants were ensured throughout the study in line with the instructions of the Ethics Committee.
: Not applicable.
: The authors declare no conflict of interest.