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https://www.orthospinenews.com/2019/10/08/viseon-inc-announces-the-first-worldwide-use-of-its-high-definition-visualization-device-in-a-multi-level-lateral-lumbar-deformity-procedure/
Viseon Inc. Announces the First Worldwide Use of Its High Definition Visualization Device in a Multi-Level Lateral Lumbar Deformity Procedure