Received: 23 August 2016
Accepted: 2 January 2018
First Online: 19 January 2018
Ethics approval and consent to participate
: The approval to conduct the study and authorizations were obtained from the Medical Ethic Committee of the University of Lubumbashi (UNILU/CEM/027/2013–27 september 2013), the Provincial Ministry of Education, Scientific Research, Transport and Energy of Katanga (N° 10.5/0209/CAB/MIN.PROV/ED.R.TE/KAT/2014–11 march 2014) and the authorities of the selected schools. Data was used with high confidentiality and no names were recorded. The informed written consent to participate was obtained from the parent/guardians of the child or adolescent.
: The informed written consent to participate and for the publication of individual clinical details was obtained from the parent/guardians of the child or adolescent.
: The authors declare that they have no competing interests.
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