RA pts are at risk of pneumonia, & inflamed lung mucosa can produce RF/CCP. Are these linked via subclinical lung injury? Seropos RA pts @BrighamWomens have double the pneumonia risk post-adjustment. We're still learning more about RF... @jeffsparks OP0111 #EULAR2020 @RheumNow https://t.co/C3CYpXABGc