title: Retraction notice to “Triptolide, histone acetyltransferase inhibitor, suppresses growth and chemosensitizes leukemic cells through inhibition of gene expression regulated by TNF-TNFR1-TRADD-TRAF2-NIK-TAK1-IKK pathway” [Biochem. Pharmacol. 82 (2011) 1134–1144].