Spondylolysis

• Orthopaedic Hospital Valdoltra — Ankaran, Slovenia
• University of Primorska, Science and Research Centre of Koper, Institute for Kinesiology Research — Koper, Slovenia
• University Medical Centre Ljubljana — Ljubljana, Slovenia
• University Medical Centre Maribor — Maribor, Slovenia

Not specified

• Department of Anesthesiology and Pain Medicine, Anesthesia and Pain Research Institue, Yonsei Universiy College of Medicine — Seoul, South Korea

• Medical Center Haaglanden — The Hague, Netherlands
• Diakonessenhuis — Utrecht, Netherlands

• Scripps Green Hospital — La Jolla, California, United States
• University of California San Francisco — San Francisco, California, United States
• Columbia Orthopedic Group — Columbia, Missouri, United States

• Beth Israel Deaconess Medical Center — Boston, Massachusetts, United States
• Foundation Surgical Hospital — San Antonio, Texas, United States
• Methodist Hospital — San Antonio, Texas, United States

• Clinic Genolier — Genolier, Canton of Vaud, Switzerland
• Hôpital du Valais — Sion, Valais, Switzerland

• Children's National Medical Center — Washington D.C., District of Columbia, United States

Not specified

• Anhui Province Hospital — Hefei, Anhui, China
• Beijing Jishuitan Hospital — Beijing, Beijing Municipality, China
• Henan Provincial People's Hospital — Zhengzhou, Henan, China
• Jiangxi Provincial People's Hospital — Nanchang, Jiangxi, China