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Michael Pollan, author of The Omnivore’s Dilemma and The Botany of Desire, includes An Epidemic of Absence in his “Favorite Books on Food and Nature” list at Barnes & Noble. His blurb in toto: What in the world does the ecosystem of microbes living in the gut have to do with the development of autism or heart disease or allergy? Quite possibly everything, according to this masterful work of scie