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What is a central dominant galaxy?
Clinical Trial
A research study conducted with human volunteers to evaluate the safety and effectiveness of medical interventions.
Retrospective Study
A research approach that examines existing data or records to study outcomes that have already occurred.
Incidence
The frequency at which a new event, such as a new case of a disease, occurs within a defined population over a specified period of time.
AIDS
Acquired Immunodeficiency Syndrome, a life-threatening condition caused by the human immunodeficiency virus (HIV), which severely damages the immune system.
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