In {TAIL ~ a defibrillator}, {HEAD ~ the case} cannot be connected to either of the defibrillating leads or else current will flow into the case, decreasing defibrillator efficacy 
In
In { TAIL ~ a defibrillator } , { HEAD ~ the case } can not be connected to either of the defibrillating leads or else current will flow into the case , decreasing defibrillator efficacy
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH