Vanderbilt University
University of Miami
Transverse Myelitis
Neurologic Gait Disorders
Optic Nerve Diseases
Multiple Sclerosis
Chronic Progressive Multiple Sclerosis
Spinal Cord
Optic Nerve
African Americans
European Continental Ancestry Group
Age of Onset
Health Services Accessibility
Proportional Hazards Models
Survival Analysis
Cohort Studies
Retrospective Studies
Wheelchairs
United States