A total of 150 subjects, 75 per group, are being sought for this study. The best time to capture the list of potential patients is at the inception of their diagnosis and treatment. The TBI practice is equipped with electronic scheduling, medical record and billing systems. This poses significant advantages for patient recruitment to this project. On a daily basis, the project coordinator/patient recruiters (PC/PR) can access daily schedules for new patients entering the system for all 17 TBI physicians. This can be cross-correlated later with exiting diagnosis of leg pain to ensure maximum capture of potential candidates.