1. Bristol Heart Institute, Level 7, Bristol Royal Infirmary, Faculty of Medicine & Dentistry, University of Bristol, Bristol, UK
2. Cardiothoracic Surgery, The Chinese University of Hong Kong, Faculty of Medicine, Prince of Wales Hospital, Shatin, Hong Kong
3. Cardiovascular Surgery, Nippon Medical School, 1-1-5 Sendagi Bunkyo-ku, Tokyo 113-8603, Japan
4. Congenital Heart Surgery, Royal Hospital for Children and University of Bristol, Level 7, Bristol Royal Infirmary, Marlborough Street, Bristol BS2 8HW, UK