Abbreviations: ACE, angiotensin-converting enzyme; BMI, body mass index; CAPs, concentrated ambient particles; DBP, diastolic blood pressure; MI, myo­cardial infarction; NA, not applicable; NPs, nano­particles; SBP, systolic blood ­pressure. Values are expressed as n (%), mean ± SD, or median (IQR), as appropriate. Here, ACE is linked to myocardial infarction.