10. Patients with active autoimmune diseases within 2 years of enrollment into the study including, but not limited to, rheumatoid arthritis, systemic lupus erythematosus, systemic sclerosis, Sjogren's syndrome, Wegener's granulomatosis, ulcerative colitis, Crohn's disease, myasthenia gravis, Graves' disease, or uveitis except for psoriasis not requiring systemic therapy, vitiligo or alopecia areata, or hypothyroidism; if an autoimmune condition has been clinically silent for 12 months or greater, the patient may be eligible for enrollment.