The article by Dahan et al.  that appeared in the May 2001 issue of Anesthesiology (2001; 94:824–32) contained an error.

The end of the last sentence on page 830 should have read:“. . . the need for functional μ-receptors in the production of respiratory depression from δ-receptors” (not from μ-receptors).

The letter by Gentili that appeared in the May 2001 issue of Anesthesiology (2001; 94:935) contained an error.

The end of the sixth sentence should have read:“. . . from 300 patients per year in some public hospitals to 1,200 per year in some private institutions” (not to 120 per year).