Osteonecrosis

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

Not specified

• 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

• Ewha Womans University Mokdong Hosptial — Seoul, South Korea

• St. Jude Children's Research Hospital — Memphis, Tennessee, United States

• Toyama Municipal Hospital — Toyama, Japan

• Hospital das Clínicas da Universidade Estadual de Campinas — Campinas, São Paulo, Brazil

• University of Michigan — Ann Arbor, Michigan, United States

• Royan Institute — Tehran, Iran