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By now, maybe some people are starting to question... this is all nice and well, but where is the evidence? I think we are already deep enough in this discussion (thanks guys!!) that we can start talking about some of the landmark studies.

To try to make it as interactive and informative as possible, I thought I might ask the question this way, but feel free to modify:

- What is one major landmark study you think we should know about?
- What did you learn from it?
- How do you apply it in your day to day practice? Limitations?