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Supplemental Information

Questionnaire administered to study participants

DOI: 10.7287/peerj.preprints.613v1/supp-1

Additional Information

Competing Interests

The authors declare they have no competing interests.

Author Contributions

Olubusuyi M Adewumi conceived and designed the experiments, performed the experiments, wrote the paper, prepared figures and/or tables.

Adebowale O. Olayinka performed the experiments, reviewed drafts of the paper.

Babatunde A. Olusola performed the experiments, reviewed drafts of the paper.

Temitope O.C. Faleye performed the experiments, reviewed drafts of the paper.

Waidi F. Sule analyzed the data, prepared figures and/or tables, reviewed drafts of the paper.

Olubukola Adesina reviewed drafts of the paper.

Human Ethics

The following information was supplied relating to ethical approvals (i.e., approving body and any reference numbers):

UI/UCH Ethics Committee (UI/EC/11/0058) and Oyo State Ministry of Health (AD3/479/349).


This work was partly funded by the University of Ibadan Senate Research Grant (SRG/COM/2010/14A) awarded to Dr. M.O. Adewumi. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

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