Corrections and Clarifications
In Table 1 (p. 406) of the article "Transfer of genes to humans: Early lessons and obstacles to success" by Ronald G. Crystal (20 Oct., p. 404), and in the text (p. 406), the vector used in the clinical trial by J. A. Roth (reference 42 of the article) should have been given as wild-type p53 (not as anti-sense p53).