[1] Nestle Inst Hlth Sci SA, Prote & Metabon, Lausanne, Switzerland
[2] Nestec Ltd, Appl Math, Nestle Res Ctr, Lausanne, Switzerland
[3] Univ Milan, Dept Med Sci, Milan, Italy
[4] Geriatr Unit Ca Grande Fdn Maggiore Policlin Hosp, Milan, Italy
[5] Univ Bologna, Dept Expt Pathol, I-40126 Bologna, Italy
[6] Univ Bologna, Interdept Ctr L Galvani, Bologna, Italy
[7] Univ Florence, Dept Expt Pathol & Oncol, Florence, Italy
[8] Univ Bologna, Dept Pharmaceut Sci, I-40126 Bologna, Italy