Mayo clinic: Theres a delay in diagnosing Seronegative RA - 1st joint swelling to diagnosis of RA was 187 days for seroneg vs 11 days for seropositive patients (P<.001). Seronegative RA less likely to achieve remission (28% vs 50% at 5 years) (P=.007) https://t.co/Hgewjmt1CL