Rapidly acting forms of {TAIL ~ radiation}, which require application for less than about 30 seconds and preferably for {HEAD ~ less than about 5 seconds} are particularly useful 
Rapidly acting forms of { TAIL ~ radiation } , which require application for less than about 30 seconds and preferably for { HEAD ~ less than about 5 seconds } are particularly useful
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH