Funding for this research was provided by:
African Population Health Research Center, Kenya and International Development Research Center (IDRC) and the African Population Health Research Center, Kenya. (107209–001)
Received: 8 May 2019
Accepted: 10 June 2019
First Online: 24 June 2019
Ethics approval and consent to participate
: Ethical approval for the study was granted by the University of Ibadan/University College Hospital Ethical Review Committee, Nigeria in 2013 and the assigned reference number is UI/EC/13/0415. Written consents was obtained from all participants as well as the consent to publish the findings.
: Not Applicable.
: The authors declare that they have no competing interests.