The questionnaire was administered to a total of 373 health care workers: all of the 236 physicians who work in surgical specialties at the Ankara University Ibn-i Sina Hospital and to all of the 137 dentists in the Gazi University Faculty of Dentistry. Dentists were included in this study because, aside from being HCWs themselves, there are a number of studies in the literature which show that dentists, citing various reasons, may also refuse to treat patients with contagious diseases. And, in order to better assess the fact on which the third premise of presumed consent is based, we decided to include only professional health care workers, instead of students and others who might still be in the process of deciding whether or not to currently enter the field.