Zhang, Y., L. Zheng, J. Liu, J. Li, J. Zhang, J. Ma, and Y. Song. “Postoperative Radiotherapy and N2 Non-Small Cell Lung Cancer Prognosis: A Retrospective Study Based on Surveillance, Epidemiology, and End Results Database”. Journal of Oncology Research, vol. 3, no. 2, July 2021, pp. 1-7, doi:10.30564/jor.v3i2.3513.