Using an interim analysis based exclusively on an early outcome in a randomized clinical trial with a long-term clinical endpoint

Garcia Barrado, L., Burzykowski, T., Legrand, C., & Buyse, M. (2022). Using an interim analysis based exclusively on an early outcome in a randomized clinical trial with a long-term clinical endpoint. Pharmaceutical statistics, 21(1), 209-219. https://doi.org/10.1002/pst.2165 (Original work published 2022)