Please assess the completion status of the following clinical trial:

Trial Title: Comparison of Treatment Success of Botox Injection in the Internal Sphincter Versus Isosorbidedinitrate Ointment in Patients With an Anal Fissure

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: TRIPLE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* all consecutive patients over the age of 18 with a chronic anal fissure presenting to our surgical outpatient clinic~Exclusion Criteria:~* pregnancy~* previous anal surgery~* Crohn's disease~* systemic causes of an anal fissure

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- Botox injection (Type: EXPERIMENTAL): injection of 10U of BT (Botox®; Allergan, Irvine, California, USA) in the IAS on each side of the anterior midline. In addition, a placebo ointment has to be applied to the anoderm six times a day
- ISDN ointment (Type: ACTIVE_COMPARATOR): application of ISDN 1% ointment 6 times a day. injection of placebo into internal anal sphincter

Based on this trial design, predict the completion outcome and termination type (if applicable).