Cassim N, Buthelezi EP, Coetzee LM, Glencross DK. Assessing CD4 rejections across a national laboratory service for 2018 in South Africa: highlighting the importance of adherence to national handbook guidelines. J Public Health Afr. 2022;13(1):1278. https://www.publichealthinafrica.org/jphia/article/download/1278/652