Sitthiwongsa, P., Y. Chetchotsak, and S. Sinawat. “Quality of Life (Visual Aspect) in Proliferative Diabetic Retinopathy Patients After Laser Photocoagulation”. Srinagarind Medical Journal, vol. 27, no. 3, Aug. 2013, pp. 242-9, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/11132.