Comparison of methods for determining energy expenditure of elderly people in free-living conditions B. Morio, P. Ritz, E. Verdier, C. Montaurier, Y. Boirie, B. Beaufrère and M. Vermorel Reprod. Nutr. Dev., 37 3 (1997) 358-359 DOI: 10.1051/rnd:19970354