 7. Patients must have negative serology tests for HIV Human immunodeficiency virus. Hepatitis B, Hepatitis C, and ANA antinuclear antibodies titer have to be within 2 times of upper limit of normal within 28 days of enrollment. Patients must have no clinical rheumatoid arthritis RA. RA criteria are as follows: 1 morning stiffness in and around joints lasting at least 1 hour before maximal improvement; 2 soft tissue swelling arthritis of 3 or more joint areas observed by a physician; 3 swelling arthritis of the proximal interphalangeal, metacarpophalangeal, or wrist joints; 4 symmetric swelling arthritis; 5 rheumatoid nodules; 6 the presence of rheumatoid factor; and 7 radiographic erosions andor periarticular osteopenia in hand andor wrist joints. 