{HEAD ~ The implantable drug pump} 11, further comprising {TAIL ~ a user programmable control mechanism} coupled to the drug pump and effective to selectively control movement of the at least one valve between the open and closed positions 
comprising
{ HEAD ~ The implantable drug pump } 11 , further comprising { TAIL ~ a user programmable control mechanism } coupled to the drug pump and effective to selectively control movement of the at least one valve between the open and closed positions
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL 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 OTH