Abstract Polyarticular juvenile idiopathic arthritis (JIA) is a category of JIA where multiple joints are affected by chronic inflammation. and where serious and lasting damage to joints is the expected natural history in untreated disease. There is evidence of response to disease-modifying antirheumatic and biologic drugs. but little evidence of permanent remission from any of the ex... https://www.powerhousefilmers.shop/product-category/merchandise/