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An error occurred in the abstract of a paper published in the July issue (Denny CC, Grady C. Clinical research with economically disadvantaged populations. J Med Ethics 2007;33:382–5). The sentence “The economically disadvantaged are thought of as “venerable” to exploitation, impaired decision making, or both, thus requiring either special protections or complete exclusion from research.” The word “venerable” should read “vulnerable”. The journal apologises for this error.