Text and Data Mining valid from 2019-04-29
Received: 20 December 2017
Accepted: 12 April 2019
First Online: 29 April 2019
Ethics approval and consent to participate
: The institutional ethics committee of the research on health of the University of Douala gave ethical approval (reference number CEI-UD/139/02/2015/T) for the study and permission was obtained from Cité des Palmiers health district, Deido district Hospital and Douala general hospital.
: Not Applicable.
: The authors declare that they have no competing interests.
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