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.
Leverage plots (Sall, 1990) of modeled linear relationships between each outcome and age at fitting of amplification. The solid lines indicate the modeled relationship, the dashed lines indicate the area within a .05 significance region and the horizontal dashed line is the group mean of the outcome measure.
