Table 1 Experimental groups of study
| Experimental groups | Procedure |
|---|---|
| Control | Intact without intervention |
| Sphinctrotomy | Sphinctrotomy + Normal saline (in situ injection) |
| Laser | Sphinctrotomy + Laser irradiation (90 s/Daily/up to 14 days) |
| ChABC | Sphinctrotomy + 10 μl of 100 U/ml ChABC (in situ injection) |
| ChABC + Laser | Sphinctrotomy + 10 μl of 100 U/ml ChABC + Laser irradiation (90 s/Daily/up to 14 days) |