The averages of peak ΔF/F between the 26th and 30th stimuli were significantly higher for the CF + PF stimulation group (10.6 ± 1.1%, n = 10, P < 0.001) and CF stimulation alone group (9.0 ± 1.6%, n = 10, P < 0.01) than for the PF stimulation alone group (2.8 ± 0.7%, n = 9), while the averages of peak ΔF/F between the 86th and 90th stimuli for the CF + PF group (11.2 ± 0.9%, n = 10) were significantly higher than those for the CF alone group (3.6 ± 0.7%, n = 10, P < 0.001) and PF alone group (5.7 ± 1.3%, n = 9, P < 0.01). Here, CFTR is linked to cystic fibrosis.