1. Center for Biomaterials, Korea Institute of Science & Technology; Seoul 130-650 Republic of Korea
2. Department of Biomolecular Science; University of Science and Technology (UST); Seoul 136-791 Republic of Korea
3. Research Institute for Basic Sciences and Department of Chemistry; College of Sciences, Kyung Hee University; Seoul 130-701 Republic of Korea
4. Department of Pharmacology and Dental Therapeutics; and Research Center for Biomineralization Disorders, School of Dentistry, Chonnam National University; Gwangju 500-757 Republic of Korea
5. Department of Prosthodontics; School of Dentistry, Chonnam National University; Gwangju 504-190 Republic of Korea