1. Department of Periodontology and Implant Dentistry, New York University College of Dentistry, New York, NY, USA
2. Department of Epidemiology and Health Promotion, New York University College of Dentistry, New York, NY, USA
3. Copenhagen Gerontological Oral Health Research Center, School of Dentistry, University of Copenhagen, Copenhagen N, Denmark
4. Department of Public Health and Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark
5. Department of Public Health, University of Copenhagen, Danish Aging Research Centre, University of Aarhus, Odense and Copenhagen, Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark