1. Institute of Cardiac and Aortic Disorders, SRM Institutes for Medical Science (SIMS Hospital), Chennai, India
2. Vascular & Endovascular Surgery, Royal Blackburn Teaching Hospital, Haslingden Road, Blackburn, UK
3. Department of Thoracic and Cardiovascular Surgery, West German Heart and Vascular Center Essen, University Hospital Essen, Essen, Germany