O’Reardon JP. Pharmacologic and therapeutic strategies in treatment-resistant depression. Introduction and clinical presentations. CNS Spectr. 2009 Mar; 14(Suppl 4):4-6.
						 
					 
				 
			 
		
			
	
	    
        
    
        
			
				
					
    
        
        
            
            
               O’Reardon JP. Pharmacologic and therapeutic strategies in treatment-resistant depression. Introduction and clinical presentations. CNS Spectr. 2009 Mar; 14(Suppl 4):4-6.