The research follows numerous earlier studies that did find an increased risk . Felson , however , says the new findings are n't sufficient to quell the trend . Autoimmune conditions , including rheumatoid arthritis , psoriasis , and inflammatory bowel disease , arise when the body 's immune system goes awry and begins attacking healthy cells and tissue . Previous studies have found that drug inhibitors as much as double the risk .
The research follows numerous earlier studies that did find an increased risk . Felson , however , says the new findings are n't sufficient to quell the trend . Previous studies have found that drug inhibitors as much as double the risk .