Spinal fusions serve as case study for debate over when certain surgeries are necessary

By some measures, Federico C. Vinas was a star surgeon. He performed three or four surgeries on a typical weekday at the Daytona Beach, Fla., hospital that employed him, and a review showed him to be nearly five times as busy as other neurosurgeons. The hospital paid him hundreds of thousands in incentive pay. In all, he earned as much as $1.9 million a year.

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