Received: 4 December 2019
Accepted: 24 December 2019
First Online: 3 March 2020
Ethics approval and consent to participate
: The study was approved by the ethics committee of the Faculty of Medicine, Ain Shams University, Cairo, Egypt. Reference number is not available. Informed oral consent to participate in the study was received from each participant and/or his/her next of kin. Patients and/or their next of kin who declined to participate were excluded, as were those who refused to complete the assessment.
: Not applicable.
: The authors declare that they have no competing interests.