title: Conference on clinical trials in periodontal diseases. Chicago, USA, May 21-23, 1985. Dedicated to the memory of John W. Fertig, Ph.D.
mesh_terms: D002986:Clinical Trials as Topic; D049673:History, 20th Century; D006801:Humans; D010510:Periodontal Diseases / Q000175:diagnosis / Q000266:history / Q000628:therapy; D012107:Research Design