Correction 
RNA 9: 1301-1307 (2003)
Ribosomal dynamics inferred from variations in experimental measurements
Irene S. Gabashvili, Michelle Whirl-Carrillo, Michael Bada, D. Rey Banatao, and Russ B. Altman

A citation to Laughrea 1994 accidentally remained in this paper, with no corresponding entry in the References section. The complete reference is:

Laughrea, M. 1994. Structural dynamics of translating ribosomes: 16S ribosomal RNA bases that may move twice during translocation. Mol. Microbiol. 11: 999-1007.