Phuthong, S., T. Pasachan, W. Settheetham-Ishida, D. Tiwawech, S. Natphopsuk, and D. Settheetham. “The Association of MDR1 (C3435T) Polymorphism and Cervical Cancer in Women Taking Oral Contraceptives”. Srinagarind Medical Journal, vol. 29, no. 5, Dec. 2014, pp. 455-60, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/25922.