Incorrect Insertion Nucleotides. In the Observation by Salviati et al titled "Cytochrome c Oxidase Deficiency Due to Novel SCO2 Mutation Mimics Werdnig-Hoffmann Disease," published in the May issue of the ARCHIVES (2002;59:862-865), the nucleotides were incorrect. In the "Results" section, on page 864, left-hand column, second complete paragraph, the third sentence should have read as follows: "Negative clones were sequenced and revealed a 10–base pair duplication of nt-1302 to nt-1311 (Figure 2B) that disrupts the reading frame of the messenger RNA and gives rise to a truncated 83 amino acid polypeptide in which the 21 amino acids at the C-terminus are abnormal (Figure 2C)."