3Cassel C K, Leipzig R M, Cohen H J, et al. Geriatric Medicine[ M ]. 4th ed. New York: Springer, 2003. 545 -599.
4Gueyffier F, Bulpitt G, Boissel J P, et al. Antihypertensive drugs in very old people: a subgroup meta-alalysis of randomized controlled trials [ J ]. Lancet, 1999, 353:793 - 796.