TY - JOUR T1 - Aging and Dementia: More Gray Hair and Less Gray Matter JF - American Journal of Neuroradiology JO - Am. J. Neuroradiol. SP - 1641 LP - 1642 VL - 22 IS - 9 AU - Daryl R. Gress Y1 - 2001/10/01 UR - http://www.ajnr.org/content/22/9/1641.abstract N2 - ER -