Give a man a fish and he eats for a day, teach a man to fish and he eats for life.

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When he gets hungry, he eats some bread and fish that have been left in the hotel kitchen.

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Fred Volkmar, director of the Child Study Center at the Yale University School of Medicine, who wasn't involved in the recent study, described one former patient who has a master's degree, goes to work and lives on his own, but every night he eats the same meal, canned fish, reads on the computer about software and then goes to bed.

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Kalkwarf's wife, a nurse, makes sure he gets plenty of fish oil and eats other foods enhanced with omega-3 fatty acids, which have been suggested to improve cognition.

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