About the Authors

Frank G. Oppenheim

fropp@bu.edu

Affiliation Department of Periodontology and Oral Biology, Boston University Henry M. Goldman School of Dental Medicine, Boston, Massachusetts, United States of America

Eva J. Helmerhorst

Affiliation Department of Periodontology and Oral Biology, Boston University Henry M. Goldman School of Dental Medicine, Boston, Massachusetts, United States of America

Urs Lendenmann

Current address: Ivoclar Vivadent, Schaan, Switzerland

Affiliation Department of Periodontology and Oral Biology, Boston University Henry M. Goldman School of Dental Medicine, Boston, Massachusetts, United States of America

Gwynneth D. Offner

Affiliations Department of Periodontology and Oral Biology, Boston University Henry M. Goldman School of Dental Medicine, Boston, Massachusetts, United States of America, Department of Medicine, Boston University Medical Center, Boston, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: FGO. Performed the experiments: UL. Analyzed the data: GDO UL. Contributed reagents/materials/analysis tools: GDO. Wrote the paper: FGO EJH UL GDO.