Text and Data Mining valid from 2020-02-10
Received: 18 September 2019
Accepted: 14 January 2020
First Online: 10 February 2020
Ethics approval and consent to participate
: The study was an evaluation of a surveillance system. Non-research determination was granted by Kano State Health Research Ethics Committee. Written informed consent was obtained from all the study participants prior to data collection.
: Not applicable.
: The authors declare that they have no competing interests.