New York University

Department for Reconstructive Dentistry and Gerodontology, School of Dental Medicine …

McGill University, Faculty of Dental Medicine and Oral Health Sciences

Universidade Federal do Rio Grande do Sul

University of florida

Professor Emeritus, Temple University, Adjunct Professor, Midwestern University

Professor and Chair, University of Iowa

Clinic of General, Special care, and Geriatric Dentistry, University of Zurich

Department of Dentistry, School of Medicine, Fujita Health University

Professor, National & Kapodistrian University of Athens, School of Dentistry