In-Season Variations in Head Impact Exposure among Youth Football Players.
                             
                            
                            
                                
                            
                            
                                
                            
                            
                            
                                
                                    
                                            
    Urban JE, Kelley ME, Espeland MA, Davenport EM, Whitlow CT, Powers AK, Maldjian JA, Stitzel JD. In-Season Variations in Head Impact Exposure among Youth Football Players. J Neurotrauma. 2019 01 15; 36(2):275-281.