Choomsri, Piyaporn, Wanichya Bumpenboon, Yodying Wasuthit, Chakkrapan Euanorasetr, Preeda Sumritpradit, Weerapat Suwanthunma, and Panuwat Lertsithichai. 2010. “Upper Gastrointestinal Endoscopy Findings in Patients Presenting With Dyspepsia”. The Thai Journal of Surgery 31 (1). https://he02.tci-thaijo.org/index.php/ThaiJSurg/article/view/227825.