Received: 16 December 2019
Accepted: 6 February 2020
First Online: 11 February 2020
Ethics approval and consent to participate
: Ethics approval was obtained from the institutional review board of St Paul’s Hospital Millennium Medical College, Addis Ababa. The study was also evaluated and approved by the Data Protection Official at the Norwegian Centre for Research Data (ref. 53104). Furthermore, the study was evaluated by the research ethics committee of the Southeastern Norway health region and found to be exempt from substantial evaluation (2016/875/REK sør-øst C). Participants were informed orally and in writing and signed a written consent form.
: Not applicable.
: The authors declare that they have no competing interests.