Genetic variant in folate homeostasis is associated with lower warfarin dose in African Americans. - Daneshjou R; Gamazon ER; Burkley B; Cavallari LH; Johnson JA; Klein TE; Limdi N; Hillenmeyer S; Percha B; Karczewski KJ; Langaee T; Patel SR; et al. (Blood, 2014)