Chronic Low Back Pain

• San Marcus Research Clinic, Inc. — Miami, Florida, United States
• Pharma Research International, Inc. — Naples, Florida, United States
• Georgia Institute for Clinical Research,LLC — Marietta, Georgia, United States
• Central Kentucky Research Associates — Lexington, Kentucky, United States

• Centro de Atendimento em Reabilitação e Fisioterapia - FCT/UNESP — Presidente Prudente, São Paulo, Brazil

• Umberto I Hospital — Rome, Italy

• Université de Lausanne, Service de Rhumatologie, Département de l'Appareil Locomoteur — Lausanne, Switzerland

• Hospital de Egas Moniz — Lisbon, Portugal

• Oslo University Hospital Ullevål — Oslo, Norway

• Vrije Universiteit Brussel — Brussels, Belgium

• Université du Québec à Trois-Rivières — Trois-Rivières, Quebec, Canada

Not specified

• Chuv-Unil — Lausanne, Canton of Vaud, Switzerland