#EULAR2020 OP0160 Prospective study of Hopkins Lupus Cohort: HCQ blood levels can predict risk for thrombotic events in SLE. Dr. M Petri advocates this is another reason for monitoring HCQ whole blood levels. Goal HCQ whole blood level should be 1000-1500 ng/mL @rheumnow https://t.co/mM6jsJ2Qmf