[1] INRA Clermont Fd Theix, Equipe Vitamines, Unite Maladies Metab & Micronutr, F-63122 St Genes Champanelle, France
[2] Ctr Hosp Univ, Hotel Dieu, Ctr Hepato Gastroenterol, F-63058 Clermont Ferrand, France
[3] INSERM, UMR 384, Fac Med, Clermont Ferrand, France
[4] INRA Clermont Fd Theix, Lab Microbiol, F-63122 St Genes Champanelle, France