Received: 29 April 2019
Accepted: 17 July 2019
First Online: 5 August 2019
Ethics approval and consent to participate
: This study was approved by Health Research Ethic Committee (HREC) of the Institute of Public Health, Obafemi Awolowo, University, Ile-Ife, Osun state, Nigeria.
: Not applicable
: The authors declare that there are no competing interests regarding the publication of this paper.