Osteoarthritis, Knee

• Hospital Universitario de Coimbra — Coimbra, Portugal
• Hospital Egaz Moniz — Lisbon, Portugal
• Hospital Conde do Bertiandos — Ponte de Lima, Portugal
• Complejo Hospitalario Juan Canalejo — A Coruña, Spain

• University of Maryland Baltimore — Baltimore, Maryland, United States

Not specified

Not specified

• Sunnybrook Health Sciences Centre — Toronto, Ontario, Canada

• Tucson Orthopaedic Institute — Tucson, Arizona, United States
• Northwestern University Feinberg School of Medicine — Chicago, Illinois, United States
• Skylight Health Research Burlington — Burlington, Massachusetts, United States
• Durham Bone and Joint Specialists — Ajax, Canada

• Medical University of South Carolina — Charleston, South Carolina, United States

• Michigan Technological University — Houghton, Michigan, United States

• Denver Hip & Knee, Inc. — Parker, Colorado, United States
• Foundation for Orthopaedic Research & Education — Tampa, Florida, United States
• Northside Hospital, Inc. — Atlanta, Georgia, United States
• U of L Health — Louisville, Kentucky, United States

• Hospital Universitario San Cecilio- Distrito Sanitario Metropolitano Granada — Granada, Spain