No abstract available
MeSH terms
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Action Potentials / drug effects*
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Animals
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Calcium / antagonists & inhibitors
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Calcium / pharmacology
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Colon / drug effects
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Electrodes
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Guinea Pigs
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In Vitro Techniques
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Membrane Potentials / drug effects*
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Muscle, Smooth / drug effects*
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Portal Vein / drug effects
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Stomach / drug effects
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Ureter / drug effects
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Verapamil / pharmacology*