In one embodiment, {HEAD ~ the implantable drug pump} includes {TAIL ~ a housing} having at least one inlet port and an outlet port formed therein 
includes
In one embodiment , { HEAD ~ the implantable drug pump } includes { TAIL ~ a housing } having at least one inlet port and an outlet port formed therein
OTH OTH OTH OTH HEAD HEAD 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