Authors: John C. Quinn, MD, Avery L. Buchholz, MD, MPH, Thomas Buell, MD, Regis Haid, MD, Shay Bess, MD, Virginie Lafage, PhD, Frank Schwab, MD, Christopher Shaffrey, MD, and Justin S. Smith, MD, PhD

Authors: Thomas J. Buell, MD, Avery K. Buchholz, MD, MPH, John C. Quinn, MD, Regis W. Haid Jr, MD, Shay Bess, MD, Virginie Lafage, PhD, Frank Schwab, MD, Christopher I. Shaffrey, MD, and Justin S. Smith, MD, PhD

Authors: Thomas Sorenson, BS, Jane M. Korducki, MD, and Charles R. Watts, MD, PhD

Authors: Bárbara Nettel, MD, Alma Rosa García, MD, David Gallardo, MD, Gerardo Guinto, MD, Bayron Sandoval, MD, and Iris Angélica Feria-Romero, PhD

Authors: Wendell B. Lake, MD

Authors: Michael Karsy, MD, PhD, MSc, David L. Gillespie, PhD, Kevin Horn, MD, PhD, Jonathan B. Harper, BS, Michael Ruesch, BS, Jeffrey T. Yap, PhD, and Randy L. Jensen MD, PhD

Authors: Michael Karsy, MD, PhD, MSc, David L. Gillespie, PhD, Kevin Horn, MD, PhD, Jian Guan, MD, Andrea A. Brock, MD, MSCI, and Randy L. Jensen, MD, PhD

Authors: Thomas J. Sorenson, BS, Gabriel Kaufmann, BS, John Chen, MD, PhD, Jeremy Cutsforth-Gregory, MD, P. Pearce Morris, MB, BCh, and Giuseppe Lanzino, MD

Authors: Alvaro Campero, MD, MgCh, PhD, Julio Diloné, MD, and Pablo Ajler, MD, PhD

Authors: Carlos Zamorano, MD, Miguel Abdo, MD, Javier Kelly, MD, Gerardo Guinto, MD, and Alexis Del Real, MD