3886461 E-CABG European Multicenter Study on Coronary Artery Bypass Grafting 11 3886454 ECABG endoscopic coronary artery bypass grafting 6 3886459 E-CABG European Coronary Artery Bypass Grafting 5 3886463 E-CABG European CABG registry 2 3886457 E-CABG European registry of Coronary Artery Bypass Grafting 2 3886456 E-CABG elective CABG 1 3886462 E-CABG European CABG 1 3886460 E-CABG European multicenter coronary artery bypass grafting 1 3886458 E-CABG European registry of CABG 1