Resolution: standard / high
Figure 4.
DAG showing where birth weight (BW) has a direct effect on blood pressure (BP) and shares an unmeasured common cause (U1) with current weight (CW) which itself has another unmeasured common cause (U2) with BP.
Arah Emerging Themes in Epidemiology 2008 5:5 doi:10.1186/1742-7622-5-5
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