Official websites use .gov A .gov website belongs to an official government organization in the United States. Secure .gov websites use HTTPS A lock ( Locked padlock icon ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
![MedlinePlus - Health Information from the National Library of Medicine](https://cdn-ak-scissors.b.st-hatena.com/image/square/9e7f27387be95ce5a02cab2e6fdd0a7fa9be8e21/height=288;version=1;width=512/https%3A%2F%2Fmedlineplus.gov%2Fimages%2Fshare_home_1.jpg)