Mahawantung, Jirawan, Duangchan Suwannasaen, Wipawee Saenwongsa, and Ganjana Lertmemongkolchai. 2010. “Optimization of Enzyme-Linked Immunospot Assay for Quantitative Analysis of Interferon Gamma Producing Cells”. Archives of Allied Health Sciences 22 (3). Khon Kaen, Thailand:240-51. https://he01.tci-thaijo.org/index.php/ams/article/view/66189.