Performance of biomarkers FibroTest, ActiTest, SteatoTest, and NashTest in patients with severe obesity: meta analysis of individual patient data. oleh Thierry Poynard, Guillaume Lassailly, Emmanuel Diaz, Karine Clement, Robert Caïazzo, Joan Tordjman, Mona Munteanu, Hugo Perazzo, Bernard Demol, Robert Callafe, François Pattou, Frederic Charlotte, Pierre Bedossa, Philippe Mathurin, Vlad Ratziu, FLIP consortium