Funding for this research was provided by:
Maastricht University through Nuffic scholarship
Received: 4 July 2017
Accepted: 7 February 2018
First Online: 20 February 2018
Ethics approval and consent to participate
: The study was approved by ethical review committee of the College of Health Sciences, of Mekelle University. Moreover, the confidentiality of the patients’ information was safeguarded. Requirement of informed consent was waived by the ethical review committee due to the retrospective design of the study.
: Not applicable
: The authors declare that there is no any competing interest.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.