1. Division of Periodontics, Section of Oral and Diagnostic Sciences, Columbia University College of Dental Medicine, New York, NY, USA
2. Department of Periodontology, Operative and Preventive Dentistry, University of Bonn, Bonn, Germany
3. Biomedical Informatics Shared Resources, Bioinformatics Division, Herbert Irving Comprehensive Cancer Center
4. Columbia Initiative in Systems Biology, Columbia University Medical Center, New York, NY, USA
5. Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY, USA
6. Computational Molecular Medicine Research Group, Department of Medical Informatics, Biometry and Epidemiology, University of Munich, Munich, Germany
7. UBC Centre for High-Throughput Biology, Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada