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First edition

Prof. Dr. Luiz Vialle (General Editor)
Department of Orthopedics- Spine Unit
Catholic University
Curitiba, Brazil

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Dr. Ilya Laufer
Neurosurgery
Memorial Sloan-Kettering Cancer Center
New York, USA

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Dr. Jorrit-Jan Verlaan
Orthopedics
University Medical Center Utrecht
Utrecht, The Netherlands

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Illustrator: Michele Haller
Project manager: Lars Veum