Huang, Y. Y., Lee, H. K., Juan, C. H., Hastorf, P., Tsai, S. K., & Tsou, M. Y. (2005). Conscious Sedation in Gastrointestinal Endoscopy. Acta Anaesthesiologica Taiwanica, 43(1), 33-38. https://www.airitilibrary.com/Article/Detail?DocID=02541319-200503-43-1-33-38-a