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.
Box plot showing the distribution of bulk milk corrected optical densitiy (COD) values for BVDV and BHV-1 from dairy herds in nine public milk centres in Thailand, 2000–2001. Boxes represent the first quartile (q1), median and third quartile (q3) of the COD values from each milk centre, and lower (L) and upper (U) limits are defined as: L = q1 - 1.5 × IQR and U = q3 + 1.5 × IQR, where IQR = q3 - q1.
