Initial combination with bosentan and sildenafil as compared with initial monotherapy with the same drugs in patients with pulmonary arterial hypertension: a case-control, multicentre study
                              
 
                                  Event:
                                  
                                    ESC Congress 2016
                                  
 
                                  Topic:
                                  
                                    Chronic pulmonary hypertension
                                  
 
                                  Session:
                                  
                                    Chronic pulmonary hypertension