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- The American Orthopaedic Association was formed in 1887 & their published proceedings were the start of what today is called the Journal of Bone & Joint Surgery.
- A British society was initially formed in 1894 but became defunct & then the BOA was founded in 1918
- AAOS - founded in 1933
- AOA - founded in 1936
- COA - founded 1945
- NZOA - founded 1950. The February inaugural meeting was held in Wellington
- SAOA – founded 1951