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.
Three men are standing in a kitchen; one man is elegantly dressed, the other two are workman, one wearing an apron; one man stirs a mixture in a large pot on a stove.
Copyright:
The National Library of Medicine believes this item to be in the public domain. (More information)