{TAIL ~ The photocrosslinking} can use a sensitizer and {HEAD ~ exposure} to light to achieve crosslinking 
{ TAIL ~ The photocrosslinking } can use a sensitizer and { HEAD ~ exposure } to light to achieve crosslinking
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH