TY - GEN AU - Stanworth,D R TI - Rheumatoid factors and the disease state in rheumatoid arthritis SN - 0003-4967 PY - 1991///0801 KW - Arthritis, Rheumatoid KW - immunology KW - Humans KW - Rheumatoid Factor N1 - Publication Type: Comment; Letter UR - https://doi.org/10.1136/ard.50.6.406 ER -