Rheumatoid factor (RF) is a type of antibody, an immune system protein that helps the body fight foreign substances like bacteria and viruses, called antigens. Antibodies, also known as ...

Each patient was also genotyped for markers in the HLA region and tested for two hallmarks of the disease: rheumatoid factor (RF) and antibodies to cyclic citrullinated peptides (CCP). Comparisons ...

Genetic markers may help predict response to TNF inhibitor therapy in rheumatoid arthritis, potentially leading to more ...