Aging decreases the abundance of retinoic acid (RAR) and triiodothyronine (TR) nuclear receptor mRNA in rat brain: effect of the administration of retinoids. - Enderlin,V.; Alfos,S.; Pallet,V.; Garcin,H.; Azais-Braesco,V.; Jaffard,R.; Higueret,P. (FEBS Lett, 1997)