David Spiegelhalter is Winton Professor of the Public Understanding of Risk at Cambridge University and a Senior Scientist in the Medical Research Council's Biostatistics Unit.

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After some prodding, Google put me in touch with Eli Peli, a professor of ophthalmology at the Harvard Medical School and a senior scientist at the Schepens Eye Research Institute.

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The findings add to growing evidence that calorie restriction can benefit health and longevity, but this shouldn't prompt already skinny seniors to start dieting, said Carol Greenwood, a senior scientist and assistant director of the Kunin-Lunenfeld Applied Research Unit at Baycrest, a Toronto academic medical center focused on aging.

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