Shannon Kelly, MD, is a board-certified orthopedic spine surgeon at Washington, D.C.-based Children's National Health System.

Brandon Kelly, MD, is a board-certified neurosurgeon at Idaho Neurosurgery and Spine in Idaho Falls.

James Lawrence, MD, is a board-certified orthopedic spine surgeon at The Bone & Joint Center in Albany, N.Y.

James Mok, MD, is a board-certified orthopedic spine surgeon and associate professor at University of Chicago Medicine.

Michael X. Rohan, Jr., DO, is a board-certified orthopedic spine surgeon and the founder of Panama City-based Northwest Florida Spine.

S. Craig Humphreys, MD, is a board-certified orthopedic spine surgeon and founder of Soldotna, Alaska-based Kenai Spine.

Dante F. Vacca, MD, is a board-certified neurosurgeon at Sierra Neurosurgery Group in Reno, Nev.

Steve Chang, MD, is a board-certified neurosurgeon at Phoenix-based Barrow Brain and Spine.

Siva Sriharan, MD, is a board-certified neurosurgeon at Neurosurgical Specialists of North Florida in Gainesville.

Jens-Peter Witt, MD, PhD, is a board-certified neurosurgeon and the neurosurgery spine director at The Spine Center at University of Colorado Hospital in Aurora.

Ann M. Parr, MD, PhD, is a board-certified neurosurgeon and director of spinal neurosurgery at Minneapolis-based University of Minnesota Medical School.

Ernesto R. Otero-Lopez, MD, is a board-certified orthopedic spine surgeon at Albuquerque-based New Mexico Orthopaedics.

Douglas Slaughter, MD, is a board-certified orthopedic spine surgeon at New Jersey Spine & Orthopedic Center in Bridgewater.

Praveen Kadimcherla, MD, is a board-certified orthopedic spine surgeon at Atlantic Spine Center in West Orange, N.J.

Douglas Orndorff, MD, is a board-certified orthopedic spine surgeon at Durango-based Spine Colorado.

Aaron J. Bianco, MD, is a board-certified orthopedic spine surgeon at Syracuse (N.Y.) Orthopedic Specialists.

Rodwan K. Rajjoub, MD, is a board-certified neurosurgeon at Williamsport, Pa.-based UPMC Susquehanna.

Jeremy R. James, MD, is a board-certified orthopedic spine surgeon at DISC of Louisiana in Hammond and Covington.

Branko Ppra, MD, is a board-certified orthopedic spine surgeon at Milwaukee-based Branko PRPA MD Spine Surgery.

Daniel M. Birk, MD, is a neurosurgeon and the director of the Neurosurgery Spine Center at Stony Brook (N.Y.) Medicine.