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