{TAIL ~ The selection} of {HEAD ~ both amount} and time is easily made by one skilled in the art 
{ TAIL ~ The selection } of { HEAD ~ both amount } and time is easily made by one skilled in the art
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH