{HEAD ~ Both the laser radiation and cooling spray} are delivered in {TAIL ~ a non contact mode} to the tissue 
are delivered in
{ HEAD ~ Both the laser radiation and cooling spray } are delivered in { TAIL ~ a non contact mode } to the tissue
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH