LETTER TO THE EDITOR (ONLINE ONLY) Correction for “Reply to Moss et al.: Military and medically relevant models of blast-induced traumatic brain injury vs. ellipsoidal heads and helmets,” by Michelle K. Nyein, Amanda M. Jason, Li Yu, Claudio M. Pita, John D. Joannopoulos, David F. Moore, and Raul Radovitzky, which appeared in issue 17, April 26, 2011, of Proc Natl Acad Sci USA (108:E83; first published April 18, 2011; 10.1073/pnas.1102626108).The authors note that they incorrectly stated “No material property values are given, making the work impossible to reproduce” on page E83, right column, first paragraph, lines 5–6. Geometric and material...