The Two Rivers Dog Mushers Association will not participate in the International Federation of Sleddog Sports World Championship, which is scheduled to be held in Fairbanks next March. The association decided against participating earlier this week because the IFSS subscribes to the World Anti-doping Code and is banning the use of medications commonly used in dog care for distance racing. It’s unclear if the event, which could bring $1.1 million to the Fairbanks North Star Borough, will or will not be cancelled.