Laohavichitra, Kannikar, and Thawee Ratanachu-ek. 2018. “Clinical Efficacy of Endoscopic Ultrasound-Guided Fine Needle Aspiration (EUS-FNA) Performing in Upper Abdomen: A Single Center Experience”. The Thai Journal of Surgery 39 (1):30-37. https://he02.tci-thaijo.org/index.php/ThaiJSurg/article/view/219934.