Srimartpirom, S., W. Tassaneeyakul, V. Kukongwiriyapan, and W. Tassaneeyakul. “Genetic Polymorphism of Thiopurine S-Methyltransferase in a Northeastern Thai Population”. Journal of Basic and Applied Pharmacology, vol. 24, July 2015, p. 137, https://li01.tci-thaijo.org/index.php/JBAP/article/view/36565.