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In Reply.—The mechanism for excitation-contraction, as outlined in our article, is appropriate for cardiac and not smooth muscle. Drs Miller-Hance and Stull offer a clear description of the proposed mechanism for smooth-muscle contraction, which is an area, as they point out, still undergoing considerable investigation.
CHO C, PRUITT AW. Calcium Channel-Blocking Drugs-Reply. Am J Dis Child. 1986;140(12):1216. doi:10.1001/archpedi.1986.02140260018013
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