Chotikavanich, S., Kosrirukvongs, P., Duangpatra, J., Prabhasawat, P., Booranapong, W., Chirapapaisan, C. and Srivannaboon, S. 2019. A Two-Year Outcome of Intrastromal Corneal Ring Segment Implantation in Keratoconus: Initial Report in Thai Patients. Siriraj Medical Journal. 71, 4 (Jul. 2019), 302–309.