This article is only available in the PDF format. Download the PDF to view the article, as well as its associated figures and tables.
Classified Advertising. Arch Otolaryngol Head Neck Surg. 1991;117(4):457–464. doi:10.1001/archotol.1991.01870160115025
Coronavirus Resource Center
Customize your JAMA Network experience by selecting one or more topics from the list below.