Ratanasiri, A., Ratanasiri, T., Lam, T., & Cheng, K. (2013). Medical Students’ Khowledge and Attitude Concerning Cigarrette smoking : A study in medical students at Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand. Srinagarind Medical Journal, 7(1), 18–27. Retrieved from https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13597