{HEAD ~ Methods} and apparatus for performing {TAIL ~ a non continuous circumferential treatment} of a body lumen 
for performing
{ HEAD ~ Methods } and apparatus for performing { TAIL ~ a non continuous circumferential treatment } of a body lumen
HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH