Retraction of: Activation of Akt Rescues Endoplasmic Reticulum Stress-Impaired Murine Cardiac Contractile Function via Glycogen Synthase Kinase-3β-Mediated Suppression of Mitochondrial Permeation Pore Opening (Antioxid Redox Signal 15(9);2011:2407-2424; doi: 10.1089/ars.2010.3751)