Ryan T J, Faxon D P, Gunnar R M, Kennedy J W, King S B, Loop F D, Peterson K L, Reeves T J, Williams D O, Winters W L
Office of Scientific Affairs, American Heart Association, Dallas, TX 75231.
Circulation. 1988 Aug;78(2):486-502. doi: 10.1161/01.cir.78.2.486.