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. 2014 Jul 8;473(6):1971–1977. doi: 10.1007/s11999-014-3762-z

Table 2.

Stratification of athletes per sport

Sport Number of athletes included
Professional American football 154
Professional baseball 82
Professional hockey 122
Professional basketball 67
Olympic swimming 1
Olympic skiing 1
Olympic water polo 2
Professional ballet 1
Professional martial arts 1
Professional sailing 2
Unknown sport 17
Total number of athletes included in analysis 450