a source of {TAIL ~ energy} sufficient to heat tissue to form {HEAD ~ a denatured proteinaceous substance}; and 
a source of { TAIL ~ energy } sufficient to heat tissue to form { HEAD ~ a denatured proteinaceous substance } ; and
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH