Wanted: very high-end experts in brain chemistry

I'm quite upset to hear that Terry Pratchett has been diagnosed with a rare form of early-onset Alzheimer's Disease:

In a brief note to fans entitled "An Embuggerance," Pratchett, 59, said he was taking the news "fairly philosophically" and "possibly with a mild optimism."

"I would have liked to keep this one quiet for a little while, but because of upcoming conventions and of course the need to keep my publishers informed, it seems to me unfair to withhold the news," he wrote on the Web site of Paul Kidby, who has illustrated many of his books.

[. . .]

"Frankly, I would prefer it if people kept things cheerful, because I think there's time for at least a few more books yet :o)" he wrote in his message. "I know it's a very human thing to say 'Is there anything I can do,' but in this case I would only entertain offers from very high-end experts in brain chemistry."