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