1. Division of Microbiology and Molecular Genetics; School of Medicine; Loma Linda University; Loma Linda CA USA
2. Center for Dental Research; School of Dentistry; Loma Linda University; Loma Linda CA USA
3. Division of Biochemistry; School of Medicine; Loma Linda University; Loma Linda CA USA
4. Institute of Oral Biology; Kyung Hee University; Seoul Korea