1Department of Biological Sciences, College of Natural Sciences, Wonkwang University, Iksan, 570-749 Korea
2Department of Prosthodontic Dentistry, Uijeongbu St. Mary’s Hospital, The Catholic University of Korea, Uijeongbu, 480-717 Korea
3Department of Dental Biomaterials, College of Dentistry, Wonkwang University, Iksan, 570-749 Korea
4School of Biological Sciences, University of Ulsan, Ulsan, 680-749 Korea
5Daegu Center, Korea Basic Science Institute, Daegu, 702-701 Korea
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