Dietary intake estimated using different methods in two Italian older populations.
Bartali B, Turrini A, Salvini S, Lauretani F, Russo CR, Corsi AM, Bandinelli S, D'Amicis A, Palli D, Guralnik JM, and Ferrucci L
Archives of gerontology and geriatrics. Nov 2003
(DOI : 10.1016/s0167-4943(03)00084-0)