1. University of Calabar; Department of Public Health; Calabar Nigeria 540271
2. College of Medical Sciences, University of Calabar; Internal Medicine; PMB 1115 Calabar Cross River State Nigeria 540001
3. Federal College of Education; Department of General Studies; Obudu Cross River State Nigeria
4. University of Calabar Teaching Hospital; Department of Paediatrics; PMB 1115 Calabar Cross River State Nigeria