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Efficacy of a football rule to prevent concussion

 

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May 20176905
Jun 20172802
Jul 20173001
Aug 20172802
Sep 20174601
Oct 20173603
Nov 20179002
Dec 20173808
Jan 20185000
Feb 20185601
Mar 20186601
Apr 20187601
May 20187600
Jun 20187000
Jul 20184401
Aug 20182600
Sep 20184002
Oct 20189400
Nov 201816602
Dec 201810202
Jan 20198702
Feb 201912603
Mar 201911700
Apr 20198402
May 20197802
Jun 20195301
Jul 20192400
Aug 20192700
Sep 20192300
Oct 20195400
Nov 20199703
Dec 20195101
Jan 20204100
Feb 20205500
Mar 20204200
Apr 20203100
May 20205604
Jun 202037010
Jul 20202500
Aug 20201301
Sep 20203501
Oct 202080401
Nov 202015801
Dec 20204300
Jan 20218202
Feb 202112005
Mar 202113202
Apr 20214401
May 20212900
Jul 2021206
Aug 2021101
Total3802083