Please assess the completion status of the following clinical trial:

Trial Title: The Effect of Perioperative Intravenous Magnesium on Pain After Endoscopic Submucosal Dissection for Gastric Neoplasm: Prospective Randomized Double-blind Placebo Controlled Study

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE4
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~1. ASA 1\~2, 2. age of 40- 80 years~Exclusion Criteria:~1. patients who cannot read,~2. patients refusing the study~3. allergy to magnesium~4. chronic pain~5. chronic abuse of opioid or NSAID~6. neuromuscular block~7. atrioventricular conductance block~8. liver failure,

- Gender: ALL
- Minimum Age: 40 Years
- Maximum Age: 80 Years
- Healthy Volunteers: f

Study Arms:
- normal saline (Type: EXPERIMENTAL): None
- magnesium sulfate (Type: ACTIVE_COMPARATOR): None

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