1. Skeletal Diseases Genome Research Center, Kyungpook National University Hospital, Kyungpook National University, Daegu 700-412, Korea.
2. Department of Pathology and Regenerative Medicine, School of Dentistry, Kyungpook National University, Daegu 700-412, Korea.
3. Department of Orthopaedic Surgery, School of Medicine, Kyungpook National University, Daegu 700-412, Korea.