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1. College of medicine, Pochon CHA university, Kumi CHA Hospital, Gyeongsangbukdo, South Korea, 2. College of medicine, Pochon CHA university, Bundang CHA Hospital, Gyeonggido, South Korea, 3. College of medicine, Kyungpook national university,Daegu, South Korea, 4. Daegu Catholic university, Daegu, South Korea, 5. College of medicine, Keimyung University, Daegu, South Korea
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