Correction: In the article “Alterations in the Hippocampal Endocannabinoid System in Diet-Induced Obese Mice” by Federico Massa, Giacomo Mancini, Helmut Schmidt, Frauke Steindel, Ken Mackie, Carlo Angioni, Stéphane H. R. Oliet, Gerd Geisslinger, and Beat Lutz, which originally appeared on pages 6273–62816273–6281 of the May 5, 2010 issue, contributions from Dr. Sodikdjon Kodirov were acknowledged without his agreement or approval.