{TAIL ~ The method} 5, wherein the pores have {HEAD ~ an average diameter} of less than 5 microns 
{ TAIL ~ The method } 5 , wherein the pores have { HEAD ~ an average diameter } of less than 5 microns
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH