A randomized trial of dural puncture epidural technique compared with the standard epidural technique for labor analgesia.
                             
                            
                            
                                
                            
                            
                                
                            
                            
                            
                                
                                    
                                            
    Cappiello E, O'Rourke N, Segal S, Tsen LC. A randomized trial of dural puncture epidural technique compared with the standard epidural technique for labor analgesia. Anesth Analg. 2008 Nov; 107(5):1646-51.