{TAIL ~ The predetermined parameters} may be selected by {HEAD ~ a user}, advantageously from a predefined list of generic expressions 
{ TAIL ~ The predetermined parameters } may be selected by { HEAD ~ a user } , advantageously from a predefined list of generic expressions
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH