Selection of {TAIL ~ an amount} of cells necessary to boost the patients immune response is within the capabilities of those skilled in the art without {HEAD ~ the need} for undue experimentation 
Selection of { TAIL ~ an amount } of cells necessary to boost the patients immune response is within the capabilities of those skilled in the art without { HEAD ~ the need } for undue experimentation
OTH OTH 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 HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH