1. Department of Conservative Dentistry, Ohu University School of Dentistry, 31-1 Misumido, Tomita-machi, Koriyama City, Fukushima 963-8611, Japan
2. Department of Oral and Maxillofacial Surgery, Ohu University School of Dentistry, 31-1 Mitsumido, Tomita-machi, Koriyama City, Fukushima 963-8611, Japan
3. Department of Oral Function and Molecular Biology, Ohu University School of Dentistry, 31-1 Misumido, Tomita-machi, Koriyama City, Fukushima 963-8611, Japan
4. Department of General Clinical Medicine, Ohu University School of Dentistry, 31-1 Misumido, Tomita-machi, Koriyama City, Fukushima 963-8611, Japan