Neurobiology. In the article “Neurotropins induce release of neurotropins by the regulated secretory pathway” by Alex Krüttgen, J. Carlsten Möller, John V. Heymach, Jr., and Eric M. Shooter, which appeared in number 16, August 4, 1998, Proc. Natl. Acad. Sci. USA (95, 9614–9619), the following correction should be noted. On page 9618, right column, line 8 should read “rat visual cortex” instead of “ferret visual cortex.” In addition the authors would like to add the personal communication of Sala et al. (1998) Eur. J. Neurosci. 10, 2185–2191.