In This Issue

Editorial Board Dustin Anderson, MD Akhil Chhatre, MD Olumide A. Danisa, MD Edward Dohring, MD Jonathan N. Grauer, MD Manish K. Kasliwal, MD Noojan Kazemi, MD Panagiotis Korovessis, MD, PhD Kai-Uwe Lewandrowski, MD Philip Louie, MD Mohammed Macki, MD Vivek Mohan, MD, MS Ripul R. Panchal, DO, FACS Christopher P. Silveri, MD Miles L. Singer, DO Anuj Singla, MD Assem Sultan, MD

Founding Editor in Chief Stuart M. Weinstein, MD, 2000-2006

Past Editors in Chief Eeric Truumees, MD, 2006-2012 Thomas Mroz, MD, 2012-2013 William J. Sullivan, MD, 2013-2018 Jonathan N. Grauer, MD, 2019-2020

Editorial Staff Kelly Campbell, MS, Director of Publications Jeff Karzen, Assistant Director, Publications Jessica Vander Naald, Graphic Designer

Purpose SpineLineTM, a peer-reviewed publication of the North American Spine Society, is published bimonthly to educate and inform NASS members on medical, ethical and policy matters in the field of spine and health care. SpineLine serves as the primary publication for the NASS membership: (1) to educate and inform NASS’ multidisciplinary members on issues of interest and relevance to spine care and research, and assist them in providing quality, cost-effective patient care; and (2) to communicate and promote the policies, professional activities and products of the association.

Statements or opinions expressed in SpineLine are those of the author(s) and do not necessarily represent positions of the North American Spine Society.

Disclosure Policy

In compliance with the NASS uniform disclosure policy (available at https://www.spine.org/Portals/0/Assets/Downloads/WhoWeAre/DisclosurePolicy.pdf), SpineLine authors are asked to disclose all financial arrangements. An indicator code (see key at right) reflecting that disclosure (including the supporting company or institution) will appear at the end of each article. Direct or indirect remuneration: Royalties, Stock ownership, Private Investments, Consulting, Speaking and/or teaching arrangements, Trips/travel

Position held in a company: Board of Directors, Scientific Advisory Board, Other office

Support from sponsors: Endowments, Research support, Grants, Fellowship support

Other: Relationships outside the one-year requirement Levels of support: A: $100 to $1000 B: $1,001 to $10,000 C: $10,001 to $25,000 D: $25,001 to $50,000 E: $50,001 to $100,000 F: $100,001 to $500,000 G: $500,001 to $1M H: $1,000,001 to $2.5M I: Greater than $2.5M

Editorial Offices SpineLineTM is published six times a year by the North American Spine Society, 150 Harvester Dr., Suite 111, Burr Ridge, Illinois 60527

Email: franklin.wetzel@bassett.org jkarzen@spine.org spineline@spine.org

Telephone: 630-230-3600 Toll-free: 866-960-NASS (6277) NASS Website: www.spine.org

Subscriptions NASS Members receive SpineLineTM as a benefit of membership. Nonmembers may subscribe for $100/year. Please call 630-230-3600 or email spineline@spine.org.

Advertising For rates and availability, please contact Rick Bacon by email at rbacon@spine.org.

NASS Board of Directors

Scott Kreiner, MD President

William Mitchell, MD First Vice President

Christopher P. Kauffman, MD Second Vice President

Patrick C. Hsieh, MD, MS, MBA Secretary

D.J. Kennedy, MD Treasurer

Zoher Ghogawala, MD, FACS Past President

Eric J. Muehlbauer, MJ, CAE Executive Director

Richard L. Skolasky, ScD Administration Council Director

Alan S. Hilibrand, MD Education Council Director

Steven W. Hwang, MD Evidence Analysis & Research Council Director

Karin R. Swartz, MD Health Policy & Advocacy Council Director

Andrew Schoenfeld, MD Strategic Growth Council Director

Sandeep Gidvani, MD Appointed Member

Michael G. Fehlings, MD, PhD, FRCSC Appointed Member

Byron J. Schnieder, MD Appointed Member

Roger Härtl, MD At-Large Member

Noam Stadlan, MD Committee on Ethics & Professionalism Liaison

Michael Y. Wang, MD Industry Relations Liaison