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               Australian Othello Federation
               Belgian Othello Federation
               Brazilian Othello Federation
               British Othello Federation
               Ceská Federace Othello
               China Othello Federation
               Danish Othello Association
               Finland Othello Association
               Fédération Française d'Othello
               Federazione Nazionale Gioco Othello
               Hong Kong Othello Association
               Japan Othello Association
               Korea Othello Association
               Malaysia Othello Association
               Nederlandse Othello Vereniging
               Othello Organisation Singapore
               Othello Club Deutschland
               Polska Federacja Othello
               Asociación Española di Reversi-Othello
               Swedish Othello Association
               United States Othello Association