1. Department of Biologic and Materials Sciences University of Michigan School of Dentistry Ann Arbor MI USA
2. Department of Pedodontics, Faculty of Dentistry Istanbul University Istanbul Turkey
3. Department of Dentistry National Taiwan University School of Dentistry Taipei City Taiwan R.O.C.
4. Department of Pediatric Dentistry University of North Carolina School of Dentistry Chapel Hill NC USA
5. Department of Molecular Genetics and Department of Pediatric Dentistry and Dental Research Institute, School of Dentistry Seoul National University Seoul Korea