In {TAIL ~ experimental animals}, {HEAD ~ expression} of RHAMM was maintained for several days, then levels dropped 
In { TAIL ~ experimental animals } , { HEAD ~ expression } of RHAMM was maintained for several days , then levels dropped
REL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH