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