id	keyword
clinat-136	heart
clinat-136	return
clinat-136	concussion
clinat-136	rate
clinat-136	racing
clinat-136	protocol
clinat-136	horse
clinat-136	sport
clinat-136	stage
clinat-136	jockeys
clinat-136	heart rate
clinat-136	ride
clinat-136	united
clinat-136	states
clinat-136	injury
clinat-136	athletic
clinat-136	riding