Lei, Langhuan, and Xingyong Wang. “Determining the Frequency of Streptococcus Pneumoniae Carriers and Its Microbial Resistance in Children”. Cellular and Molecular Biology 68, no. 2 (February 28, 2022): 203–207. Accessed May 2, 2024. https://cellmolbiol.org/index.php/CMB/article/view/4290.