Received: 2 May 2018
Accepted: 10 October 2019
First Online: 28 October 2019
Ethics approval and consent to participate
: The research protocol was approved by An-Najah National University ethics review board (Approval number 15/2/2017a). The required written approval was provided by Al-Arabi Heart Center. The research aims and methodology were explained to each participant and informed consent was obtained. The data used in this study was anonymised before its use.
: Not applicable
: Authors declare that they have no competing interests.