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.
Keel bone fracture prevalence (%) in hens older than 49 wk of age across housing system types used during lay. Colors indicate the assessment method used. Boxplots show medians and interquartile and absolute ranges of raw data plus outliers. The cross and numbers indicate mean prevalence. n indicates the number of entries within one category.
