Received: 22 October 2019
Accepted: 14 April 2020
First Online: 28 April 2020
Ethics approval and consent to participate
: The study was approved by the National Ethics Committee for Health Research (NECHR) attached to the Ministry of Health (Conakry, Guinea). The study was conducted in accordance with the Declaration of Helsinki, and the confidentiality of the data was guaranteed.
: Not applicable.
: We declare no competing interests in relation to this work.