Resolution: standard / high
Figure 1.
Change in angina class from pre- to post-enhanced external counterpulsation (EECP) treatment for non-smokers without (n = 918) and with (n = 108) second-hand smoke exposure (SHS), and current smokers (n = 363).
Efstratiadis et al. BMC Cardiovascular Disorders 2008 8:23 doi:10.1186/1471-2261-8-23
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