In the article “An Age-Dependent Interaction with Leptin Unmasks Ghrelin's Bone-Protective Effects” by Martijn van der Velde, Bram C.J. van der Eerden, Yuxiang Sun, Julia M.M. Almering, Aart-Jan van der Lely, Patric J.D. Delhanty, Roy G. Smith, and Johannes P.T.M. van Leeuwen (Endocrinology 153:3593–3602; 2012; doi: 10.1210/en.2012-1277), the authors report that they did not include the grant information from one of the authors, Roy G. Smith. The following grant information should have been included in the Acknowledgments section: The work was also supported by NIH grant R01 AG019230. The authors apologize for not including this information with the original submission.