When the surgeon determines which of the surgical instrument holders 10, 40, 50 is required for a given surgical procedure, the surgeon selects {HEAD ~ one or more packages} 36 containing {TAIL ~ the holders} 10, 40, or 50 
containing
When the surgeon determines which of the surgical instrument holders 10 , 40 , 50 is required for a given surgical procedure , the surgeon selects { HEAD ~ one or more packages } 36 containing { TAIL ~ the holders } 10 , 40 , or 50
OTH OTH OTH OTH OTH OTH 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 HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH