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Carmen Drahl
@carmendrahl
Apr 12, 2012
#Alzheimers
patients decline in fits and starts. Greg Petsko drew it out for me on a napkin.
#TEDMED
#tweepexclusive
1,011
Thursday, April 12, 2012 2:34 pm
Apple iPhone
3.9 mm
ƒ2.8
ISO 100
1/15