Use of herbal medicine and other dietary supplements in community-dwelling older people: Baseline data from the ginkgo evaluation of memory study.
Nahin RL, Fitzpatrick AL, Williamson JD, Burke GL, Dekosky ST, Furberg C. Use of herbal medicine and other dietary supplements in community-dwelling older people: Baseline data from the ginkgo evaluation of memory study. J Am Geriatr Soc. 2006 Nov; 54(11):1725-35.