In {HEAD ~ some cases} {TAIL ~ the addition} of ceria has also been found to increase stabilization 
In { HEAD ~ some cases } { TAIL ~ the addition } of ceria has also been found to increase stabilization
OTH HEAD HEAD HEAD HEAD HEAD HEAD TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH