Orthopaedic surgeons and other attendees as well as nonattendees who reference conference abstracts need to exercise good judgment when considering the implications of oral presentations of unpublished materials. When reviewing meeting presentation abstracts, readers should remember that the material being presented is often not in its definitive or ultimate form.

Participants who are unconnected to health or social services or government health insurance are less likely to have been vaccinated in the past although these persons are willing to receive vaccine if it were available.

There was no appreciable increase in methadone-induced overdose mortality in New York City during the 1990s. Both heroin-induced overdose mortality and prescriptions of methadone increased during the same interval.