Rheumatoid arthritis (RA) is a common chronic disease dominated by inflammatory synovitis. which is characterized with hyperplastic synovium. up-regulated matrix metalloproteinase (MMP) expression. hypoxic joint cavity and excessive reactive oxygen species (ROS) accumulation. https://www.ngetikin.com/limited-buy-NHL-Dallas-Stars-Lineup-iPhone-13-Skin-p119122-great-pick/