I'd be interested in people's opinions, too. Everyone knows personalized medicine is coming, but the fundamentals of the non-druggies don't add up to me.
Test gizmo companies get the love, but they are fundamentally commodities. They seem more like a herd play to me, not that money made simply by herd investing spends any differently.
Test labs maybe? But again, in a declining dollar environment for health care lab providers are all about price competition (though maybe the sheer volume increases outweighs the declining price factor).
Insurance testing? Self-directed test labs? Legally sticky or at some point.
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