A paper entitled: “X and Y versus X alone for condition A in children” was submitted to Journal A and published in 2001. Journal A has since been alerted to a paper published in Journal B in 1999, entitled: “Comparison of combination of X and Y with X alone in the treatment of condition A, ” written by two of the four authors in conjunction with another author not listed on paper A. Most of the abstract, methods, and discussion of the two papers are identical.