{HEAD ~ A cardiac pacemaker}, defibrillator, or other programmable medical device includes a source unit and {TAIL ~ a collection unit}  
includes
{ HEAD ~ A cardiac pacemaker } , defibrillator , or other programmable medical device includes a source unit and { TAIL ~ a collection unit }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH