Please assess the completion status of the following clinical trial:

Trial Title: Parental Irradiation of Ukrainian Cleanup Workers and Evacuees and Germline Mutations in Their Offspring (Trio Study)

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

Eligibility Criteria:
* INCLUSION CRITERIA:~* all parent-offspring trios/quartets selected from the group of approximately 450 trios with offspring born 42 or more weeks after the last significant parental Chernobyl-related exposure. ---The offspring can be of either sex~* Must be an adult~(age (Bullet) 18 years at interview);~* If more than one child is born to a given set of parents, the first and last such eligible siblings will be selected for participation, in the interests of maximizing the variation of time from last exposure to conception, also to maximize the signal (by including offspring closest in time to the exposure, with less likelihood of removal of damaged sperm/oocytes, and by including offspring furthest in time from the exposure, with less likelihood of direct exposure of the child, and maximizing cumulative parental preconception gonadal dose).~* Twins will be especially informative given the comparable exposures in utero and in early life. A high proportion of the trios/quartets currently reside in Kyiv. The majority of these trios/quartets have undergone regular medical examinations as a result of follow-up by the CER. Most of them are expected to be alive.~EXCLUSION CRITERIA:~* Those who cannot be located~* Those with offspring born within 42 weeks of the last significant Chernobyl-related exposure~* Those parents or offspring found to have cancer~* Those who refuse to participate in the study, or who do not provide informed consent.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 70 Years
- Healthy Volunteers: t

Study Arms:
- Trio Cohort (Type: None): families were from each of 5 exposure categories: A-father exposed, mother unexposed; B-mother exposed, father unexposed; C-both parents exposed; D-neither exposed; E-high dose emergency workers).

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