I would like to point out several errors of citation at the end of my article ``Cocaine addiction: Psychology and neuropsychology'' (29 Mar., p. 1580). In the References and Notes, reference 42 was missing. It should have read, ``42. T. Kosten et al., in preparation.'' Also in the References and Notes, reference 44 should have been numbered 43.
In the text, citation 43 should have been numbered 41. In figure 3, the attribution was missing. It should have read, ``Reprinted with permission from T. Kosten et al. (42).''