Please assess the completion status of the following clinical trial:

Trial Title: Safety, Pharmacokinetics and Efficacy of Dupilumab in Patients ≥6 Months to <6 Years With Moderate-to-Severe Atopic Dermatitis (Liberty AD PRESCHOOL)

Study Design Characteristics:
- Allocation: NON_RANDOMIZED
- Intervention Model: SINGLE_GROUP
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: NONE
- Phase: PHASE2/PHASE3
- Number of Arms: 4.0

Eligibility Criteria:
Key Inclusion Criteria~* Diagnosis of atopic dermatitis (AD) according to the American Academy of Dermatology consensus criteria at the screening visit~* Participants with documented recent history (within 6 months before the screening visit) of inadequate response to topical AD medication(s)~* IGA score at screening and baseline visits~* part A: IGA = 4~* part B: IGA ≥3~* EASI score at screening and baseline visits~* part A: EASI ≥21~* part B: EASI ≥16~* Body Surface Area (BSA) involvement at screening and baseline visits~* part A: ≥15%~* part B: ≥10%~* At least 11 (of a total of 14\*) applications of a topical emollient (moisturizer) during the 7 consecutive days immediately before the baseline visit (not including the day of randomization) (for part B of the study only)~* Baseline worst scratch/itch score weekly average score for maximum scratch/itch intensity ≥4 (for part B of the study only)~* At least 11 (of a total of 14) daily applications of low potency TCS during the 2-week TCS standardization period (beginning on day -14) leading up to the baseline visit (for part B of the study only).~Key Exclusion Criteria~* Prior treatment with dupilumab~* History of important side effects of low potency topical corticosteroids (only applicable for part B of the study)~* Having used immunosuppressive/immunomodulating drugs within 4 weeks before the baseline visit~* Treatment with a live (attenuated) vaccine within 4 weeks before the baseline visit~* Active chronic or acute infection requiring treatment with systemic antibiotics, antivirals, antiprotozoals, or antifungals within 2 weeks before the baseline visit.~* Known or suspected immunodeficiency, known history of human immunodeficiency virus (HIV) infection or HIV seropositivity at the screening visit, established diagnosis of HBV infection or HBV seropositivity at screening, established diagnosis of HCV infection or HCV seropositivity at screening~* History of malignancy at any time before the baseline visit~* Diagnosed active endoparasitic infections or at high risk of these infections~* Severe concomitant illness(es) that, in the investigator's judgment, would adversely affect the patient's participation in the study~* Body weight \<5 kg or ≥30 kg at baseline (only applicable part B of the study)~Note: Other protocol defined Inclusion/ Exclusion criteria apply

- Gender: ALL
- Minimum Age: 6 Months
- Maximum Age: 5 Years
- Healthy Volunteers: f

Study Arms:
- Part A (Open label Dupilumab): Age cohorts 1 & 2 (Type: EXPERIMENTAL): Age cohort 1: ≥2 years old to \<6 years old~Age cohort 2: ≥6 months to \<2 years old
- Part B (Double-blind): Dupilumab dose 1 (Type: EXPERIMENTAL): The results of part A will be used to guide the selection of dose levels and dosing frequency for part B.
- Part B (Double-blind): Dupilumab dose 2 (Type: EXPERIMENTAL): The results of part A will be used to guide the selection of dose levels and dosing frequency for part B.
- Part B (Double-Blind): Placebo (Type: EXPERIMENTAL): None

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