Editorial Comment
                                    The coronary collateral circulation-clinical predictors
                                    
                                    
                                                                                                                                    1University College London, Department of Cardiology, London-UK
2The London Chest Hospital, London-UK
3University College London, Department of Cardiology, London-UK
                                                                                                                        
                                    
                                2The London Chest Hospital, London-UK
3University College London, Department of Cardiology, London-UK