Official websites use .gov A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Periodical. Swan, Henry, George Maresh, Marvin E. Johnson, and George Warner. "The Experimental Creation and Closure of Auricular Septal Defects." Journal of Thoracic Surgery 20, 4 (October 1950): 542-551. Article. 11 Images.. Journal of Thoracic Surgery