1. Department of Preventive and Community Dentistry; University of Iowa College of Dentistry and Dental Clinics; Iowa City United States of America
2. Department of Prosthodontics; University of Iowa College of Dentistry and Dental Clinics; Iowa City United States of America
3. Division of Gerodontology; Faculty of Dentistry; National and Kapodistrian University of Athens; Greece
4. Australian Research Centre for Population Oral Health; Adelaide Dental School; The University of Adelaide; Adelaide Australia
5. Division of Preventive Dentistry; Department of Oral Health Dentistry; Niigata University Graduate School of Medical and Dental Science; Niigata Japan
6. Department of Prosthodontics; Gerodontology and Oral Rehabilitation Osaka University Graduate School of Dentistry; Osaka Japan
7. Department of Periodontology & Community Dentistry; Faculty of Dentistry; University of Ibadan; Ibadan Nigeria
8. Department of Oral and Maxillofacial Surgery; Faculty of Dentistry; Obafemi Awolowo University; Ile-Ife Nigeria
9. Department of Restorative Dentistry; Faculty of Dental Sciences; University of Lagos; Nigeria
10. Department of Oral Pathology; Radiology and Medicine College of Dentistry, University of Iowa,; USA
11. Department of Oral Biological & Medical Sciences; University of British Columbia; Vancouver Canada
12. Department of Oral Health Sciences; University of British Columbia; Vancouver Canada
13. Director, Center of Aging & Aging Mind and Brain Initiative, Department of Biology, College of Liberal Arts and Science; University of Iowa
14. Division of Dermatology, Department of Medicine, Faculty of Health Sciences and Groote Schuur Hospital; University of Cape Town; Cape Town South Africa
15. Department of Oral and Maxillofacial Pathology; Faculty of Dentistry; University of the Western Cape at Tygerberg Hospital; Cape Town South Africa