Aisha Fadhilah Abang Abdullah, Kee Sze Ying, Kamarul Azhar Mohd Razali, Thahira A Jamal Mohamed, Zubaidah Abdul Wahab, and Norlijah Othman. 2020. “Invasive Pneumococcal Disease in A Tertiary Paediatric Hospital in Malaysia”. Malaysian Journal of Paediatrics and Child Health 23 (1):74-82. https://mpaeds.my/journals/index.php/MJPCH/article/view/64.