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James W. Vaupel, James R. Carey and Kaare Christensen
When organisms as diverse as yeast and rodents are subjected to a restricted diet, they live longer. The good news is, according to Vaupel, Carey, and Christensen in their Perspective, that switching to a restricted diet at any age can yield the benefit of increased longevity--at least in flies (Mair et al.).
J. W. Vaupel is at the Max Planck Institute for Demographic Research, Konrad-Zuse-Strasse 1, D-18057 Rostock, Germany. E-mail: jwv{at}demogr.mpg.de J. R. Carey is in the Department of Entomology, University of California, Davis, CA 95616, USA, and the Center for the Economics and Demography of Aging, University of California, Berkeley, CA 94720, USA. K. Christensen is at the Institute of Public Health, University of Southern Denmark, DK-5000 Odense, Denmark.
