Note that J&J/Bayer's Xarelto (Rivaroxaban) RECORD -1,2, & 3 (hip and knee) studies, in which Xarelto showed superiority over Lovenox, were head-to-head with Lovenox 40mg QD, while RECORD-4 (after total knee replacement operation) was vs. Lovenox 30mg BID.