At the inception of the patient into the project, either as a participant or non-participant, a baseline assessment will be performed by the PC. Reassessment will be completed at 6, 12, 26 and 52 weeks. The PC will monitor patient status and compliance with typical treatment on a weekly basis through the computerized scheduling and medical record. Telephone contact will be made on a biweekly basis to evaluate self-reported compliance with wear and determine any intervening health care service utilization or medication use using standardized phone interview methods