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Concentration-dependent effects of mibefradil (A; n=6) and nifedipine (B; n=5) on Ca2+i at steady-state intraluminal pressures of 50, 70 and 120 mmHg. Fluorescence ratios (340 : 380 nm) are normalized to the ratio obtained under passive conditions at 70 mmHg. Results are presented as mean±s.e.mean; *P<0.05.
