Affiliation: | 1. Division of Cardiology, College of Medicine, Hangang Sacred Heart Hospital, Hallym University, Chuncheon, South Korea 2. Division of Cardiology, Severance Cardiovascular Hospital, Yonsei University Health System, 50 Yonsei-ro, Seodaemun-gu, Seoul, 120-752, South Korea 3. School of Medicine, University of Queensland, Herston, QLD, Australia 4. Ultrasound Division, Siemens Medical Solutions USA Inc., Mountain View, CA, USA
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