Please assess the completion status of the following clinical trial:

Trial Title: An Exploratory Trial of AZD3480 (TC-1734) for the Treatment of Adult Attention-Deficit/Hyperactivity Disorder (ADHD)

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: CROSSOVER
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE2
- Number of Arms: 3.0

Eligibility Criteria:
Inclusion Criteria:~* Confirmed diagnosis of DSM-IV ADHD~* Score of equal or more than 2 on at least six of nine items in at least one of the subscales of the Connor´s Adult ADHD Rating Scale (CAARS-INV)~* Score of equal or more than 4 (at least moderate severity) on the Clinical Global Impressions-Severity (CGI-S) test~Exclusion Criteria:~* Current DSM-IV Axis I psychiatric disorder (other than ADHD)~* Current user of cigarettes or other nicotine-containing product.~* Slow metabolizers as indicated by CYP2D6 genotyping.~* Use of drugs affecting cognitive function within 8 weeks prior to enrollment visit or intended use during the study.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 65 Years
- Healthy Volunteers: f

Study Arms:
- 1 (Type: PLACEBO_COMPARATOR): None
- 2 (Type: EXPERIMENTAL): None
- 3 (Type: EXPERIMENTAL): None

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