In this chapter: I. "Brain and spinal cord injury" means any injury to the brain or spinal cord which causes death or requires medical care and treatment or results in long-term disability. II. "Commissioner" means the commissioner of the department of health and human services. III. "Department" means the department of health and human services. IV. [Repealed.] V. "Risk assessment" means the measurement and evaluation of the threat resulting from these injuries. VI. "Facility" means a governmental or private agency, department, institution, clinic, laboratory, hospital, health maintenance organization, association, physician, or other similar unit diagnosing or providing treatment for brain and spinal cord injuries.