2 
I am much indebted to you for the enormous effort you have devoted to 
fulfilling a difficult task with such integrity. Your work has 
been exemplary for all of us in the scientific community. I am 
also indebted for your continued and invaluable contributions to 
this important area of science. 
Cordially 
Donald S. Fredrickson, M.D. 
Director 
Enclosures 
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