Joelf Posted September 5, 2020 Share Posted September 5, 2020 Respiratory diseases as risk factors for seropositive and seronegative rheumatoid arthritis and in relation to smoking.. Respiratory diseases increase the risk for both seropositive and seronegative RA, but only among nonsmokers. PubMed, Arthritis Rheumatol, 08/16/2020. (Also see Symptoms and Complications of Rheumatoid Arthritis) This item was posted in the ISN Newsroom. Please check the newsroom daily for updates on scleroderma and other related articles. Quote Link to post Share on other sites
dimarzio Posted September 6, 2020 Share Posted September 6, 2020 That's odd. Not necessarily the outcome you would have expected. Though the protection Nicotine seems to provide against COVID infection is equally strange. Quote Link to post Share on other sites
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