The transitioning from trials to extended follow-up studies.

Abstract

BACKGROUND Investigators may elect to extend follow-up of participants enrolled in a randomized clinical trial after the trial comes to its planned end. The additional follow-up may be initiated to learn about longer term effects of treatments, including adverse events, costs related to treatment, or for reasons unrelated to treatment such as to observe the… (More)
DOI: 10.1177/1740774514547396

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