Goldberg, S. B., Gettinger, S. N., Mahajan, A., Chiang, A. C., Herbst, R. S., Sznol, M., Tsiouris, A. J., Cohen, J., Vortmeyer, A., Jilaveanu, L., Yu, J., Hegde, U., Speaker, S., Madura, M., Ralabate, A., Rivera, A., Rowen, E., Gerrish, H., Yao, X., Chiang, V., & Kluger, H. M. (n.d.). pembrolizumab for patients with melanoma or non-small-cell lung cancer and untreated brain metastases: early analysis of a non-randomised, open-label, phase 2 trial. Lancet oncology, 17(7), 976–983. http://access.bl.uk/ark:/81055/vdc_100033761042.0x000010