Prof. Patrice Carni published a commentary in GUT on the MetaCardis consortium article recently published in the same journal: "Major microbiota dysbiosis in severe obesity: fate after bariatric surgery" (http://dx.doi.org/10.1136/gutjnl-2018-316103).

You can read the commentary here: "Severe obesity and gut microbiota: does bariatric surgery really reset the system? " (http://dx.doi.org/10.1136/gutjnl-2018-316815).