Entrapped in the liposomes is a topoisomerase I inhibitor or a topoisomerase I/II inhibitor at {HEAD ~ a concentration} of {TAIL ~ at least about 0.10 μmole drug} per μmole lipid 
of
Entrapped in the liposomes is a topoisomerase I inhibitor or a topoisomerase I / II inhibitor at { HEAD ~ a concentration } of { TAIL ~ at least about 0.10 μmole drug } per μmole lipid
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH