Phondongnok, Saisamon, Pisaln Mairiang, Piyathida Kuhirunyaratn, Phuangphaka Sadee Nielsen, and Karnchanasri Singhpoo. “The Level of Anti HBs Antibody Titer after Booster Dose in Medical Students”. Srinagarind Medical Journal 33, no. 3 (May 5, 2018): 266–271. accessed September 17, 2026. https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/122239.