<qa>  What is the RA criteria for patients?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. 