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. 2021 Jul 6;8:702489. doi: 10.3389/fcvm.2021.702489

Figure 1.

Figure 1

Flow chart of study participants. Sample selection and exclusion criteria for the comparison of HF and non-HF participants, as well as the association between DII and HF. MCQ, the questionnaire of Medical Conditions; NHANES, National Survey of the National Center for Health Statistics; *Including one of the following diagnostic history: hypertension, diabetes, prediabetes, coronary artery disease, heart attack, stroke, angina.