1. Center for Biomaterials; Korea Institute of Science and Technology; Hwarangro 14-gil 5, Seoungbuk-gu Seoul 136-791 Republic of Korea
2. Department of Biomedical Engineering; Korea University of Science and Technology; 113 Gwahangno, Yuseong-gu Daejeon 305-333 Republic of Korea
3. College of Life Sciences and Biotechnology; Korea University; Seoul 136-701 Republic of Korea
4. The Heart Center of Chonnam National University Hospital; 671 Jaebongro, Dong-gu Gwangju 501-757 Republic of Korea