In another aspect of the invention, a method for evaluating the performance of {HEAD ~ a knee} of {TAIL ~ a patient} is provided 
of
In another aspect of the invention , a method for evaluating the performance of { HEAD ~ a knee } of { TAIL ~ a patient } is provided
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH