1. Department of ORL, University of Kinshasa, Kinshasa, Democratic Republic of the Con
2. Department of Family Medicine and Primary Health Care, Protestant University in Congo, Kinshasa, Democratic Republic of the Con
3. Pharmacovigilance Unit, University of Kinshasa, Kinshasa, Democratic Republic of the Con
4. Departmen of ORL, University of Lubumbashi, Lubumbashi, Democratic Republic of the Con
5. Department of Pediatrics, Kongo University, Kimpese, Democratic Republic of the Con