Please assess the completion status of the following clinical trial:

Trial Title: Effect of NAC on the Hematopoietic Reconstitution After Haploidentical Hematopoietic Stem Cell Transplantation

Study Design Characteristics:
- Allocation: None
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: PREVENTION
- Time Perspective: None
- Masking: NONE
- Phase: PHASE2
- Number of Arms: 1.0

Eligibility Criteria:
Inclusion Criteria:~Acute leukemia patients with complete remission, whose bone marrow endothelial cells were less than 0.1% detected before haploidentical hematopoietic stem cell transplantation；~Exclusion Criteria:~1. Bronchial asthma;~2. Allergic to N-acetyl-L-cystein

- Gender: ALL
- Minimum Age: 15 Years
- Maximum Age: 60 Years
- Healthy Volunteers: f

Study Arms:
- N-acetyl-L-cysteine group (Type: EXPERIMENTAL): Acute leukemia patients with complete remission, whose bone marrow endothelial cells were less than 0.1% detected before haploidentical hematopoietic stem cell transplantation, receive N-acetyl-L-cysteine.

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