20 April 2022>: Clinical Research
Effects of Interaction Between Gestational Hypertension and History of Preterm Birth on the Risk of Preterm Birth: An Analysis Based on the National Vital Statistics System Database
Xiaoqin Cao 1AE , Daoming Zu 2BCD , Yang Liu 1AE*DOI: 10.12659/MSM.935094
Med Sci Monit 2022; 28:e935094
Figure 1 Flowchart of selecting study participants from U.S. National Vital Statistics System 2019 database (Drawio version 13.9.9, diagrams.net).