{HEAD ~ The humanized anti CD74 antibody} or fragment 28, wherein {TAIL ~ the cytotoxic agent} is a drug or toxin 
wherein
{ HEAD ~ The humanized anti CD74 antibody } or fragment 28 , wherein { TAIL ~ the cytotoxic agent } is a drug or toxin
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH