BASE: a controlled, ph 4 safety RCT of IV Belimumab (10 mg/kg) or PBO (+standard Rx) given to 4018 SLE pts over 48 wks. Found no increase in all-cause mortality and special AE: w/ very low event rates (SIE 3·75%, opportunistic infx 1·8%, cancers 0·25%) https://t.co/Zc5BqXQ038