ojo, oluwafemi. “Barriers to Pneumococcal Conjugate 13 Vaccination Recommendations Among Physicians in Lagos: Challenges of Physicians in Recommending Pneumococcal Vaccine”. Babcock University Medical Journal, vol. 5, no. 1, June 2022, pp. 37-44, doi:10.38029/babcockunivmedj.v5i1.124.