David: Try looking on ispine - it's a new forum set up by Mark ******* for people who want the hard goods - Mark is a patient advocate who has observed dozens of spine surgeries, is friends with the top surgeons and has helped many. At any rate, he has a lending library that includes the proceedings of the main spine conferences - you might find a/some paper/s on the question you are agonizing over.
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Cervie trying to avoid 3-level fusion
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