Racial disparities in outcomes after cardiac surgery: the role of hospital quality.
                             
                            
                            
                                
                                    
                                            
    Khera R, Vaughan-Sarrazin M, Rosenthal GE, Girotra S. Racial disparities in outcomes after cardiac surgery: the role of hospital quality. Curr Cardiol Rep. 2015 May; 17(5):29.