Please assess the completion status of the following clinical trial:

Trial Title: Influence of Different Doses of the Vitamin B12 on Recurrent Aphthous Stomatitis

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: DOUBLE
- Phase: None
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* Patients aged 18 and older~* Suffer from RAS For at least one year, with aphthous frequency at least once a month.~Exclusion Criteria:~* known sensitivity to vitamin B12~* Don't speak Hebrew, Russian or English.~* Systemic Diseases, known in developing mouth aphthous (Behcet disease, Lupus Erythematosus, rheumatoid arthritis and AIDS disease)~* Patients who have received last year any form of vitamin B12 .~* Patients who receive a different treatment to RAS(not for pain)~* Pregnant or breastfeeding women~* patient suffering from Leber's optic atrophy~* Patients who suffer from Psychosis

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

Study Arms:
- group 1- 1000 mcg (Type: EXPERIMENTAL): Group I- will receive sublingual vitamin B12 treatment, 1000 mcg per day for 6 months
- Group 2- 100 mcg (Type: EXPERIMENTAL): Group II- will receive sublingual vitamin B12 treatment, 100 mcg per day for 6 months
- group 3- 2000 mcg (Type: EXPERIMENTAL): Group III- will receive sublingual vitamin B12 treatment, 2000 mcg per day for 6 months

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