EBF1 and triple-A syndrome: There was a study that showed species from Akkermansia muciniphila and Lachnospiraceae bacterium A2 were significantly higher in the control group than that in the AAA group, while six species, namely, Lachnospiraceae bacterium, COE1, Corynebacterium stationis, Firmicutes Bacterium ASF500, Helicobacter bilis, and Clostridium leptum, were increased in the AAA group (Xie et al., 2020).