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Additional Information

Competing Interests

The author declares that she has no competing interests.

Author Contributions

Grace Gachanja conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Human Ethics

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

Ethics approval for the study was received from the Kenyatta National Hospital (KNH) Research Standards and Ethics Committee (Approval #P373/10/2010) and the Walden University Institutional Review Board (Approval #11-10-10-03904).


The author received no funding for this work.

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