{HEAD ~ The following examples} do not necessarily represent {TAIL ~ optimal conditions} for the use of the present invention; they are intended to be exemplary only and represent currently preferred embodiments of the present invention 
not necessarily represent
{ HEAD ~ The following examples } do not necessarily represent { TAIL ~ optimal conditions } for the use of the present invention ; they are intended to be exemplary only and represent currently preferred embodiments of the present invention
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH