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.
Distribution of the length (number of words) of the concatenated header-diagnosis text. While the horizontal axis denotes the number of words for the concatenated text, the vertical axis is the number of occurrences (number of specimens) for that length
