Scientists analyze blood to test for toxic airplane air exposure

Scientists analyze blood to test for toxic airplane air exposure
http://edition.cnn.com/2009/US/08/17/bleed.air.tests/

"Inside a freezer in a research laboratory at the University of Washington are blood and blood plasma samples from 92 people who suffer from mysterious illnesses, including tremors, memory loss and severe migraine headaches.  Terry Williams hugs her two boys -- Jake, left, and Zack -- in 2006, before she says toxic cabin air made her sick."