Epidemiology of Trauma; Phenotypes of Multimorbidity; Epidemiology Using Multimodal Biomarkers; Chronic Effects of Traumatic Brain Injury; Neuroepidemiology; Epilepsy Outcomes Research; Quality Measure Development; Quality of Epilepsy Care; Quality of Care for Traumatic Brain Injury; Health Services Research; Health-related Instrument and Survey Development; Experimental Design, Outcomes Research