%0 Journal Article %T Is 9-Cis-Retinoic Acid the Endogenous Ligand for the Retinoic Acid-X Receptor? %A Wolf, George %J Nutrition Reviews %V 64 %N 12 %P 532-538 %@ 0029-6643 %D 2006-12-01 %I Oxford University Press %~ DeepDyve