Please assess the completion status of the following clinical trial:

Trial Title: Dietary Treatment for Chronic Urticaria

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

Eligibility Criteria:
Inclusion Criteria:~* Urticaria +/- angioedema present for a minimum of 6 weeks;~* Agree to be on anti-histamine prn;~* Age older than 8 years old, with no upper age limit;~* Causes such as parasite infestation, microbial and viral infections, autoimmune disease, or other pathology that could account for the U/A/P should be excluded;~* Skin prick test and/or radioallergosorbent (RAST) test are negative for all food allergens tested, or patient had achieved no symptomatic improvement after strict avoidance of all skin test-positive foods;~Exclusion Criteria:~* Pregnant or breast feeding women;~* Patients who is taking central nervous system (CNS) acting agents (including tranquilizers, antidepressants, sedatives, hypnotics or antiepileptics) at any time;

- Gender: ALL
- Minimum Age: 8 Years
- Maximum Age: None
- Healthy Volunteers: t

Study Arms:
- Treatment group (on low histamine diet) (Type: EXPERIMENTAL): 78 subjects who come to Allergy Centre for treatment of idiopathic urticaria, with or without angioedema and pruritus (U/A/P), will be randomized into two parallel groups; treatment group (TG) will be asked to follow a histamine-restricted diet for 4 weeks and the control group (CG) will be asked to follow a well-balanced diet instructed by a dietitian for 4 weeks. A well-balanced diet for the CG subject is tailor-made by the dietitian according to subject's usual intake to ensure that the subject's energy requirement is met and all food groups are consumed.
- Well-balanced diet (Type: ACTIVE_COMPARATOR): Diet tailor-made by the dietitian according to subject's usual intake to ensure that the subject's energy requirement is met and all food groups are consumed.

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