Fig 1. Conceptual frame-work regarding potential confounders and intermediates for the association between prenatal smoking exposure and risk of preeclampsia.
Figure notes: G1—first generation G2—second generation
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.