Please assess the completion status of the following clinical trial:

Trial Title: PHNA, Efficacy of Tretinoin Cream on Post-phototherapy Hyperpigmentation

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

Eligibility Criteria:
Inclusion Criteria:~* Age: older than 19~* A patient with stable non-segmental vitiligo~* A patient with symmetrical vitiligo lesions on face~* A patient with the willingness to comply with the study protocol during the study period and capable of complying with it.~* A patient who signed the informed consent prior to the participation of the study and who understands that he/she has a right to withdrawal from participation in the study at any time without any disadvantages.~Exclusion Criteria:~* Age: lower than 20~* A pregnant or lactating patient~* A patient with active or spreading vitiligo~* A patient who cannot understand the study or who does not sign the informed consent~* Women of childbearing potential not using an effective method of contraception properly

- Gender: ALL
- Minimum Age: 19 Years
- Maximum Age: None
- Healthy Volunteers: t

Study Arms:
- Tretinoin 0.05% cream group (Type: EXPERIMENTAL): Tretinoin 0.05% cream 25g for 1 month, applied on the half side of the face after randomization, once a day every night
- Placebo (Type: PLACEBO_COMPARATOR): PHYSIOGEL Daily Moisture Therapy Creme 150ml for 1 month, applied on the other half side of the face once a day every night

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