Safety and Effectiveness Study of the TOPS System, a Total Posterior Arthroplasty Implant Designed to Alleviate Pain Resulting From Moderate to Severe Lumbar Stenosis

Orthopedic Spine Care of Long Island, Huntington Station

Buffalo Spine Surgery, Lockport

Saint Joseph Medical Center & Orthopaedic Associates, Baltimore

Carolinas Medical Center Hospital - Neurosurgery & Spine Associates, Charlotte

Florida Orthopaedic Institute, Tampa

Milwaukee Spinal Specialists, Milwaukee

NeuroSpine Center of Wisconsin, Appleton

Illinois Neuro Spine Center, Ogden

Columbia Orthopedic Group, Columbia

Institute for Advanced Spinal Research In California, Beverly Hills

Century City Doctors Hospital, Beverly Hills

Seton Medical Center, Daly City

Yale University - School of Medicine, New Haven

The Orthopaedic & Sports Medicine Ctr., Trumbull

The Boston Spine Group, Boston

New England Neuro Assoc., Springfiled