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.
Partial path diagram of the full model shown for one twin only. For the estimates and interactions, see table 1 the adjusted model. BWT1 = Birth weight twin 1, Circle = latent variables, square = measured variables, triangle = definition variables in the means model, MZ MC = monozygotic monochorionic, A = additive genetic effects, C = effects of common environment, E = effects of unique environment
