Study citation irrespective of retraction status

Helmy et al [1] recently reported on a study that was designed to evaluate the therapeutic equivalence of balanced 6% hydroxyethyl starch (HES) 130/0.4 (Tetraspan) vs saline-based 6% HES 130/0.4 (Voluven) regarding the volume effect and the effect on acid-base status and renal functions in patients undergoing major urologic procedures. In the Introduction section of the article, reference was made to a study of Boldt et al [2] that needed to be retracted because of unethical publishing [3]. I propose that this error be corrected.

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