It's possible, for instance, that Americans are more skeptical about their school system and government than Scandivanians are of theirs.

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Joshua Rauh, a pension expert at the Kellogg School of Management, is skeptical.

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Michael Phillips, a board member and clinical assistant professor at New York University School of Medicine, asked a series of skeptical questions.

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George Cotsarelis, professor and chair of dermatology at the Perelman School of Medicine at the University of Pennsylvania, in Philadelphia, is skeptical of product claims.

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