An experimental process sometimes used when relapse treatment with steroids has not been effective. Blood is removed from the body, plasma is removed from the blood, and the remaining red and white blood cells are circulated back into the body. This procedure is performed in a medical setting. Individuals will need to check with their insurance provider to see if this is a covered procedure. Uninsured individuals should consult with the facility where they will receive plasma exchange to see if the facility offers a financial-assistance program.