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This Viewpoint discusses the US Food and Drug Administration's upcoming mandate on diversity actions plans for trial sponsors and the importance of developing accountability mechanisms to monitor those plans. [ABSTRACT FROM AUTHOR]

Platform trials are a type of randomized clinical trial that allow simultaneous comparison of multiple intervention groups against a single control group that serves as a common control based on a prespecified interim analysis plan. The platform trial design enables introduction of new interventions after the trial is initiated to evaluate multiple interventions in an ongoing manner using a single overarching protocol called a master (or core) protocol. When multiple treatment candidates are available, rapid scientific therapeutic discoveries may be made. Platform trials have important potential advantages in creating an efficient trial infrastructure that can help address critical clinical questions as the evidence evolves. Platform trials have recently been used in investigations of evolving therapies for patients with COVID-19. The purpose of this Users' Guide to the Medical Literature is to describe fundamental concepts of platform trials and master protocols and review issues in the conduct and interpretation of these studies. This Users' Guide is intended to help clinicians and readers understand articles reporting on interventions evaluated using platform trial designs. This Users' Guide to the Medical Literature describes the fundamental concepts of platform trials and master protocols and reviews issues in the conduct and interpretation of these studies. [ABSTRACT FROM AUTHOR]