Looking for a corroborating article now. You realize, of course, it is astonishing he lived this long with ALS. RIP, good sir. You will be sorely missed.
Later: All similar to this, right now.
Even Later: NPR for the win.
Day Later: I pray noone makes off with your brain, as they did with Einstein's (trivia note, at the same hospital I was born). May you not fall victim to human curiousity ("We don't know what we're looking for, but we'll know it when we see it").