1. Food and Nutrition Dept., Protein Resources Laboratory, School of Food Engineering; Univ. of Campinas; Campinas SP Brazil 13083-862
2. Food Technology Dept., Oils and Fats Laboratory, School of Food Engineering; Univ. of Campinas; Campinas SP Brazil 13083-970
3. Biochemistry and Tissue Biology Dept., Inst. of Biology; Univ. of Campinas; Campinas SP Brazil 13083-970
4. Internal Medicine Dept., School of Medical Sciences; Univ. of Campinas; Campinas SP Brazil 13083-887