Flexible trial design in practice - stopping arms for lack-of-benefit and adding research arms mid-trial in STAMPEDE: a multi-arm multi-stage randomized controlled trial
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M. Parmar | M. Sydes | D. Dearnaley | N. James | N. Clarke | M. Mason | K. Sanders | G. Thalmann | J. D. de Bono | G. Jovic | J. Russell | C. Amos | John Anderson | J. Dwyer | Charlene Green | A. Ritchie | Nicholas D. James | Karen Sanders | Alastair WS Ritchie