Text and Data Mining valid from 2019-09-18
Received: 17 March 2019
Accepted: 10 September 2019
First Online: 18 September 2019
Ethics approval and consent to participate
: Before conducting the study the proposal of the study was ethically approved by the ethics committee of Omdurman Islamic University and Ministry of Health. Then informed consent was obtained from each patient and authorization from the general directors of the hospitals.
: Not applicable.
: The authors declare that they have no competing interest.