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Dr. Michiels declares no conflict of interest. Dr. Buyse reports being employed by, and holding stock in, the International Drug Development Institute, and Dr. Saad reports being employed by the International Drug Development Institute.
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This letter refers to the original article available at doi:10.1007/s40265-017-0728-y.
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Michiels, S., Saad, E.D. & Buyse, M. Authors’ Reply to Schoenfeld: “Progression-Free Survival as a Surrogate for Overall Survival in Clinical Trials of Targeted Therapy in Advanced Solid Tumors”. Drugs 77, 1139–1140 (2017). https://doi.org/10.1007/s40265-017-0761-x
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DOI: https://doi.org/10.1007/s40265-017-0761-x