The oldest old: red blood cell and plasma folate in African American and white octogenarians and centenarians in Georgia.
Hausman DB, Johnson MA, Davey A, Woodard JL, Poon LW, Allen RH, Stabler SP. The oldest old: red blood cell and plasma folate in African American and white octogenarians and centenarians in Georgia. J Nutr Health Aging. 2011 Nov; 15(9):744-50.