Flaherty, K. T., Hennig, M., Lee, S. J., Ascierto, P. A., Dummer, R., Eggermont, A. M. M., Hauschild, A., Kefford, R., Kirkwood, J. M., Long, G. V., Lorigan, P., Mackensen, A., McArthur, G., O'Day, S., Patel, P. M., Robert, C., & Schadendorf, D. (2014). Surrogate endpoints for overall survival in metastatic melanoma: a meta-analysis of randomised controlled trials. Lancet Oncology, 15(3), 297-304. https://doi.org/10.1016/S1470-2045%2814%2970007-5