Osteoarthritis, Knee

• Sai Kung District Community Centre — Hong Kong
• The Neighbourhood Advice-Action Council — Hong Kong

• Tufts Medical Center — Boston, Massachusetts, United States

• Aintree University Hospital — Liverpool, United Kingdom
• North Tyneside General Hospital — Newcastle upon Tyne, United Kingdom

• Eastern Maine Medical Center — Bangor, Maine, United States

• University of Southern Denmark — Odense, Region Syddanmark, Denmark

• Universidade Nove de Julho — São Paulo, Brazil

• Thammasat University Hospital. — Pathum Thani, Changwat Pathum Thani, Thailand

• Orthopaedic department, Thammasat university hospital — Klongluang, Changwat Pathum Thani, Thailand

Not specified

• Federal University of Sao Paulo — São Paulo, Brazil