Jitawatanarat, Potjana, Prasert Lertsanguansinchai, and Surachat Chakrapee-sirisuk. “Metastatic Esophageal Squamous Cell Carcinoma Successfully Treated With Immunotherapy: First Case Report in Thailand.”. The Bangkok Medical Journal 12, no. 1 (September 20, 2016): 87. Accessed October 28, 2021. https://he02.tci-thaijo.org/index.php/bkkmedj/article/view/221577.