1. Department of Paediatric Cardiology; Beijing Anzhen Hospital, Capital University of Medical Sciences; Beijing China
2. Division of Cardiology, Department of Medicine and Therapeutics, Prince of Wales Hospital, Li Ka Shing Institute of Health and Sciences, Institute of Vascular Medicine; The Chinese University of Hong Kong; Hong Kong SAR China
3. Royal Brompton Hospital; London UK
4. Department of Cardiology; Erciyes University; Erciyes Turkey
5. Heart Centre; Norrlands University Hospital; Uemå Sweden