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San Jose Marauders youth football players play against sports mascots during halftime of a 2015 NFL football game between the San Francisco 49ers and the Arizona Cardinals in Santa Clara, Calif. The first concussion study of its kind found youth football players are more likely to return to play less than a day after injury, compared to those in high school and college.

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Younger football players are more likely to return to the field less than a day after suffering concussions than those in high school and college, according to a new study.

By Associated Press May 2, 2016