Dairo, Magbagbeola, Ugochukwu Okechukwu-Nwankpa, and Romanus Nwankpa. 2019. “Survey on Visual Acuity Among Intra-City Commercial Vehicle Drivers in Ibadan, Southwestern Nigeria”. Journal of Public Health in Africa 10 (1). https://doi.org/10.4081/jphia.2019.789.