1. Department of Bio-Materials, Graduate School; Chosun University; Gwangju 501-759 Korea
2. Department of Cellular & Molecular Medicine, School of Medicine; Chosun University; Gwangju 501-759 Korea
3. Division of Magnetic Resonance; Korea Basic Science Institute; 804-1 Yangchung-ri Ochang Chungbuk 363-883 Korea