Erratum: Cell-permeable peptides improve cellular uptake and therapeutic gene delivery of replication-deficient viruses in cells and in vivo

Nat. Med. 9, 357–362 (2003) In the “Peptides and viruses” section of the Methods (p. 361), the sequence should have read, “...HIV Tat (amino acids 48–60, GRKKRRQRPPQ) peptides...” We regret the error.