Please assess the completion status of the following clinical trial:

Trial Title: Environmental and Genetic Determinants of NPC

Study Design Characteristics:
- Allocation: None
- Intervention Model: None
- Observational Model: CASE_CONTROL
- Primary Purpose: None
- Time Perspective: OTHER
- Masking: None
- Phase: None
- Number of Arms: None

Eligibility Criteria:
* INCLUSION CRITERIA:~Eligibility criteria for cases:~* Incident diagnosis of NPC between 2010-2015~* Age greater than or equal to 21 years at NPC diagnosis~* Histologically confirmed~* Resident of northern Taiwan greater than or equal to 6 months~Eligibility criteria for controls:~* Resident of northern Taiwan greater than or equal to 6 months~* Matched to case based on age at diagnosis, gender, and ethnicity~EXCLUSION CRITERIA:~Exclusion criteria for controls:~- Clinic attendance due to conditions associated with EBV or smoking

- Gender: ALL
- Minimum Age: 21 Years
- Maximum Age: 100 Years
- Healthy Volunteers: f

Study Arms:
- Cases with NPC (Type: None): Cases with NPC
- Hospital based controls (Type: None): Hospital based controls

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