NEUROSCIENCE. For the article “Development of hippocampal mossy fiber synaptic outputs by new neurons in the adult brain,” by Regina L. Faulkner, Mi-Hyeon Jang, Xiao-Bo Liu, Xin Duan, Kurt A. Sailor, Ju Young Kim, Shaoyu Ge, Edward G. Jones, Guo-li Ming, Hongjun Song, and Hwai-Jong Cheng, which appeared in issue 37, September 16, 2008, of Proc Natl Acad Sci USA (105:14157–14162; first published September 9, 2008; 10.1073/pnas.0806658105), the authors note that due to a printer's error, the equal contributions footnotes appeared incorrectly. The corrected author line and footnotes appear below.

Regina L. Faulkner*^†, Mi-Hyeon Jang^†‡§, Xiao-Bo Liu*^†¶, Xin Duan^‡‖, Kurt A. Sailor^‡‖, Ju Young Kim^‡‖, Shaoyu Ge^‡§, Edward G. Jones*,**^††, Guo-li Ming^‡§‖, Hongjun Song^{‡§‖††§§}, and Hwai-Jong Cheng*^{††‡‡§§}