This is a platform alteration: a trial management perspective on the operational aspects of adaptive and platform and umbrella protocols oleh Francesca Schiavone, Riya Bathia, Krishna Letchemanan, Lindsey Masters, Claire Amos, Anna Bara, Louise Brown, Clare Gilson, Cheryl Pugh, Nafisah Atako, Fleur Hudson, Mahesh Parmar, Ruth Langley, Richard S. Kaplan, Chris Parker, Gert Attard, Noel W. Clarke, Silke Gillessen, Nicholas D. James, Tim Maughan, Matthew R. Sydes, On behalf of past and present members of the STAMPEDE and FOCUS4 Trial Management Group