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Loss to Follow-up Rate, Reasons and Associated Risk Factors among Mother-Infant Pairs in a Prevention of Mother-to-Child Transmission Programme (PMTCT) in Nigeria: a Case Control Study. Niger J Paediatr. 2024;33(3&4):79-84. Accessed October 1, 2026. https://njpaediatrics.com/index.php/njp/article/view/597