Osteonecrosis

• Nagasaki University — Nagasaki, Japan
• Osaka Koseinenkin Hospital — Osaka, Japan
• Hashiba Orthopaedic Clinic — Toyama, Japan
• Toyama Municipal Hospital — Toyama, Japan

• Ottawa Hospital - General Campus — Ottawa, Ontario, Canada

• The Orthopaedic Center — Rockville, Maryland, United States
• The Orthopaedic Institute of Ohio — Lima, Ohio, United States
• Ohio Valley Orthopedic and Sports Medicine — West Chester, Ohio, United States
• Scranton Orthopaedic Specialists, PC — Dickson City, Pennsylvania, United States

• Erasme Hospital — Brussels, Belgium

Not specified

• Seoul National University Bundang Hospital — Gyeonggi-do, South Korea
• Chung-Ang University Hospital — Seoul, South Korea

• Sinai Hospital of Baltimore — Baltimore, Maryland, United States
• University of Minnesota Department of Orthopaedic Surgery — Minneapolis, Minnesota, United States
• Lutheran Medical Center — Brooklyn, New York, United States

Not specified

• George Washington University — Washington D.C., District of Columbia, United States
• Florida Orthopaedic Institute — Tampa, Florida, United States
• Sinai Hospital of Baltimore — Baltimore, Maryland, United States
• Lattimore Orthopaedics P.C. — Rochester, New York, United States

• Kansai Rosai Hospital — Amagasaki, Hyogo Pref., Japan