1Department of Microbiology, School of Medicine, Chonnam National University, Gwangju 501-746, Republic of Korea,
2Dental Science Research Institute, Chonnam National University, Gwangju 500-757, Republic of Korea,
3Department of Periodontics, Chonnam National University, Gwangju 500-757, Republic of Korea,
4Division of Periodontics, School of Dentistry, Marquette University, Milwaukee, WI, USA,
5Department of Pediatric Dentistry, Chonnam National University, Gwangju 500-757, Republic of Korea,
6Department of Pediatric Dentistry, Chonnam National University, Gwangju 500-757, Republic of Korea
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Corresponding author:
Seon-Mi Kim , Tel: +82-62-530-5826,