Characteristics and Prevalence of Asthma/Chronic Obstructive Pulmonary Disease Overlap in the United States.
                             
                            
                            
                                
                            
                            
                                
                            
                            
                            
                                
                                    
                                            
    Kumbhare S, Pleasants R, Ohar JA, Strange C. Characteristics and Prevalence of Asthma/Chronic Obstructive Pulmonary Disease Overlap in the United States. Ann Am Thorac Soc. 2016 06; 13(6):803-10.