[1] Seoul Natl Univ, Sch Dent, Dent Res Inst, Dept Cell & Dev Biol, Seoul 110749, South Korea
[2] Seoul Natl Univ, Sch Dent, Program BK21, Seoul 110749, South Korea
[3] Seoul Natl Univ, Sch Dent, Dent Res Inst, Dept Dent Biomat Sci, Seoul 110749, South Korea
[4] Seoul Natl Univ, Sch Dent, Tooth Bioengn Natl Res Lab, Dept Oral & Maxillofacial Surg, Seoul 110749, South Korea