Shih, Y. Y., Lin, C. H., Wang, T. C., Huang, C. C., Feng, W. K., & Wen, Y. R. (2013). The Use of Analgesics in Terminal Cancer Patients in Taiwan. 疼痛醫學雜誌, 23(2), 53-58. https://www.airitilibrary.com/Article/Detail?DocID=10217959-201309-201407210013-201407210013-53-58