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Article History

Received: 8 December 2017

Accepted: 2 April 2018

First Online: 10 April 2018

Ethics approval and consent to participate

: The study received administrative authorization from the Ministry of Health of Guinea. All the data collected were anonymous and accessible only by the staff involved in the study.

: The protocol of this study doesn’t include data from an individual person; therefore, consent to publication is not applicable.

: The authors declare that they have no competing interests.

: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.