How to rein in the widening disease definitions

 

In the early 1990s a small meeting of experts, part-funded by drug companies, decided on a new definition of the bone condition osteoporosis. Historically, the label was limited to people who had fractures, but with the coming of new technology that could see someone’s bone density, doctors started broadening the definition to include healthy people considered at risk of a fracture.

The experts arbitrarily and controversially created a new cut-off for

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