7. Continue from #6. Urine Protein: If urine protein to creatinine ratio is greater than or equal to 1, a 24 hour urine protein must be assessed. Subjects must have a 24 hour urine protein value less than 1 g to be eligible. Use of urine dipstick for renal function assessment is not acceptable. Thyroid function: Patients must have normal baseline thyroid function tests (TSH, T3, T4). A history of hypothyroidism and/or hyperthyroidism is allowed, as long as the patient has stable well-controlled thyroid function for a minimum of 2 months. Neurologic function: Neuropathy (sensory or motor) less than or equal to grade 1.