Please assess the completion status of the following clinical trial:

Trial Title: Effect of Medical Treatment and Prognosis of Postural Orthostatic Tachycardia Syndrome (POTS)

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE4
- Number of Arms: 4.0

Eligibility Criteria:
Inclusion Criteria:~* aged 15\<=~* developed symptoms of orthostatic intolerance accompanied by a HR rise ≥30 min-1 within the first 10 minutes of standing, HR rise ≥ 120 in the absence of orthostatic hypotension (a fall in blood pressure \[BP\] \>20/10 mm Hg).~Exclusion Criteria:~* poor drug compliance~* patients who cannot or do not want to write questionaires.~* patients who do not want draw blood

- Gender: ALL
- Minimum Age: 15 Years
- Maximum Age: 85 Years
- Healthy Volunteers: f

Study Arms:
- Propranolol (Type: ACTIVE_COMPARATOR): Start propranolol 10mg bid, and then dose up to 20mg bid after one month if tolerable
- Bisoprolol (Type: ACTIVE_COMPARATOR): Start bisoprolol 2.5mg qd P.O, and then dose up to 5mg qd. if tolerable
- Propranolol+pyridostigmine (Type: ACTIVE_COMPARATOR): Start propranolol+pyridostigmine 10mg bid +30mg bid, and then dose up to 20mg bid+30mg bid. if tolerable.
- Bisoprolol+pyridostgmine (Type: ACTIVE_COMPARATOR): start bisoprolol+pyridostgmine 2.5mg qd+30mg bid, and then, dose up to 5mg qd+30mg bid. if tolerable

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