Please assess the completion status of the following clinical trial:

Trial Title: Superficial, Cervical Block in Thyroid Surgery, a Randomized Controlled Trial

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: SUPPORTIVE_CARE
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE2/PHASE3
- Number of Arms: 4.0

Eligibility Criteria:
Inclusion Criteria:~* Elective thyroid or combined thyroid/parathyroid surgery, restricted to the central cervical compartment~* Informed consent~Exclusion Criteria:~* Intolerance to used medication~* Recurrent disease~* Neck dissection, sternotomy~* Emergency surgery

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

Study Arms:
- cervical block before surgery (Type: EXPERIMENTAL): bilateral superficial cervical block, placed before surgery (just before skin incision)
- placebo cervical block before surgery (Type: PLACEBO_COMPARATOR): placebo bilateral superficial cervical block with saline, placed before surgery (just before skin incision)
- cervical block after surgery (Type: EXPERIMENTAL): bilateral superficial cervical block, placed after surgery (just after skin closure)
- placebo cervical block after surgery (Type: PLACEBO_COMPARATOR): placebo bilateral superficial cervical block with saline, placed after surgery (just after skin closure)

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