KHURRAM, M. S. A.; KHAN, K. A. A longitudinal study of immunization status and reasons for non-vaccination of children in OPD and pediatric ward of a teaching hospital. International Journal of Contemporary Pediatrics, [S. l.], v. 7, n. 9, p. 1853–1859, 2020. DOI: 10.18203/2349-3291.ijcp20203642. Disponível em: https://www.ijpediatrics.com/index.php/ijcp/article/view/3452. Acesso em: 6 jan. 2026.