Please assess the completion status of the following clinical trial:

Trial Title: New Therapy of Laryngeal Papilloma In Children

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

Eligibility Criteria:
Inclusion Criteria:~1. 10 to 21 years of age~2. laryngeal papillomas requiring surgical treatment~3. willingness to participate in the study~4. a signed informed consent form by guardian or parent~Exclusion Criteria:~1. age less than 10 year old, or older than 21 year~2. guardian or parent does not understand or can not sign the consent form~3. malignant diseases such as laryngeal cancer~4. history of being hypersensitive to cabbage or other cruciferous vegetables~5. pregnancy

- Gender: ALL
- Minimum Age: 10 Years
- Maximum Age: 21 Years
- Healthy Volunteers: f

Study Arms:
- PDL+DIM pill (Type: EXPERIMENTAL): once-time 585 nm pulsed dye laser (PDL) treatment on the lesions, immediately followed by 3-month oral taking diindolylmethane (DIM, at 1.2-1.75mg/kg/day), in 15 subjects
- PDL+placebo pill (Type: PLACEBO_COMPARATOR): once-time PDL treatment on the lesions, then followed by 3-month oral taking DIM placebo, in other 15 subjects

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