CV events go down when #hydroxychloroqine dose goes up in SLE BUT only in non smokers. Maybe due to smoking attention of HCQ levels &/or smoking as a bigger risk for CV over rides HCQ dose? ⬇️cardiac events by 28% in non-smokers abst0871 #ACR21 @RheumNow #RheumPix https://t.co/XxgK7iRXWi