1. National Tuberculosis, Leprosy and Buruli Ulcer Control Programme , Nigeria
2. National Postgraduate Medical College of Nigeria , Ijanikin Lagos State, Nigeria
3. Bingham University Karu , Nasarwa state, Nigeria
4. Department of Paediatrics, University of Nigeria Teaching Hospital Ituku-Ozalla Enugu state , Nigeria
5. WHO Country Office Nigeria
6. Special Programme for Research & Training In Tropical Diseases (TDR), World Health , Organization , Geneva Switzerland
7. Olabisi Onabanjo University , Ago-Iwoye, Ogun State , Nigeria