Insights into rheumatoid arthritis derived from the Sa immune system

The Sa system is a recently described immune system that has a specificity and positive predictive value of nearly 100% for rheumatoid arthritis (RA) in Asia, Europe...Sa系统是近年被报道的一种免疫系统，其针对亚洲、欧洲地区类风湿关节炎（RA）的特异性与阳性预测值近乎达到100%。