ICM according to SOP ICM_EU001, V.2.7 in 68 healthy non-CF control subjects
| Secretagogue | Short circuit current response (µA/cm2) |
| Median (inner quartiles; range) | |
| IBMX/forskolin | 31 (20 to 54; 10 to 104) |
| Carbachol | 77 (43 to 144; 15 to 250) |
| Histamine | 72 (37 to 125; 14 to 250) |
CF, cystic fibrosis; IBMX, 3-isobutyl-1-methylxanthine; ICM, intestinal current measurement; SOP, standard operating procedure.