To the Editor We agree with the authors of the Viewpoint on cost-related motivations for conducting research that patients should be fully informed of the purposes of a clinical trial. We were surprised, however, that the Comparison of Age-Related Macular Degeneration Treatment Trials (CATT) was selected as an example of a clinical trial for which cost was a primary reason for performing the trial and about which patients did not receive an adequate explanation of the purpose of the study.
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