Li, X., Z. Zhai, Y. Zhu, and H. Zhou. “Comparison of Gefitinib in the Treatment of Patients With Non-Small Cell Lung Cancer and Clinical Effects of Osimertinib and EGFR Gene Mutation”. Pakistan Journal of Medical Sciences, Vol. 38, no. 6, July 2022, doi:10.12669/pjms.38.6.5456.