Text and Data Mining valid from 2018-07-05
Received: 15 February 2018
Accepted: 26 June 2018
First Online: 5 July 2018
Ethics approval and consent to participate
: Ethical approval was obtained from the Douala University Ethics Committee. Consent to participate was required and not applicable. We retrospectively used medical records.
: Not applicable.
: The authors declare that they have no competing interests.
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