Chotikavanich, Suksri, Panida Kosrirukvongs, Jatuporn Duangpatra, Pinnita Prabhasawat, Wipawee Booranapong, Chareenun Chirapapaisan, and Sabong Srivannaboon. 2019. “A Two-Year Outcome of Intrastromal Corneal Ring Segment Implantation in Keratoconus: Initial Report in Thai Patients”. Siriraj Medical Journal 71 (4):302-9. https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/205222.