Biophysics. In the article “High-resolution NMR of encapsulated proteins dissolved in low-viscosity fluids” by A. Joshua Wand, Mark R. Ehrhardt, and Peter F. Flynn, which appeared in number 26, December 22, 1998, of Proc. Natl. Acad. Sci. USA (95, 15299–15302), the term “high pressure NMR” was incorrectly printed as “HPLC NMR,” due to a printer’s error.