Nature 513, 436–439 (2014); doi:10.1038/nature13540

This Letter should have declared the following competing financial interests: “The fibroblast growth factor (FGF) molecules and related methods of use reported in this study are covered in the following published patent applications and counterparts that derive priority: (1) PCT/US2011/032848, held by R.M.E., M.D., J.W.J., and J.M.S. (handled by Salk OTD); (2) PCT/US2013/044589, held by M.M., R.G., R.M.E., M.D. and J.M.S. (handled by NYU Office of Industrial Liaison/Technology Transfer); (3) PCT/US2013/044594, held by M.M., R.G., R.M.E., M.D. and J.M.S. (handled by NYU Office of Industrial Liaison/Technology Transfer); and (4) PCT/US2013/044592, held by M.M. and R.G. (handled by NYU Office of Industrial Liaison/Technology Transfer).”.