Please assess the completion status of the following clinical trial:

Trial Title: Skin Prick Tests With AllerT in Subjects Allergic to Birch Pollen

Study Design Characteristics:
- Allocation: None
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: SCREENING
- Time Perspective: None
- Masking: NONE
- Phase: PHASE1
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion Criteria:~* history of allergy symptoms during previous birch pollen season~* positive skin prick test to birch pollen extract~Exclusion Criteria:~* pregnancy~* uncontrolled asthma~* other significant clinical conditions or immune disorders~* subjects taking antihistamines or drugs with antihistamine activity

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 45 Years
- Healthy Volunteers: f

Study Arms:
- All subjects (Type: OTHER): placebo histamine T1 T2 T3 T4 T5 T1-T2-T3 T4-T5

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