The method 4 wherein said cooling rate in {HEAD ~ step} is {TAIL ~ about 0.2° C.} per minute or less 
is
The method 4 wherein said cooling rate in { HEAD ~ step } is { TAIL ~ about 0.2 ° C. } per minute or less
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH