That's also my understanding. I would also be strongly surprised if this was the only study used by, well, most of the world to determine their policies. Even

That's also my understanding. I would also be strongly surprised if this was the only study used by, well, most of the world to determine their policies. Even if one study isn't as well-{architected, tested} as a computer engineer would hope (hint: they never are), the fact that pretty much all models/studies lead to the same overall conclusion is quite encouraging.