Edits to Fig 7 and minor edits elsewhere.

Slight change/addition, hows this sound?

"...having very different gut microbiota from adults. It is clear from comparing this result to Yatsunenko et al. 2012 that while we greatly expanded our knowledge of the diversity within the US population, there is still quite a bit of novel diversity to capture in other populations. As such, it is critical to proceed forward in ways that can better foster international participation. To that end, the American Gut Project is forging international partnerships that will bring the project closer to more people with hopes of gaining a complete understanding of what it means to be human."