Kaplan-Meier graph illustrating cardiovascular mortality in participants with ischemic heart disease during a follow-up period of 12 years of those supplemented with selenium and coenzyme Q10 versus placebo for four years on top of regular pharmaceutical treatment.

<p>Kaplan-Meier graph illustrating cardiovascular mortality in participants with ischemic heart disease during a follow-up period of 12 years of those supplemented with selenium and coenzyme Q10 versus placebo for four years on top of regular pharmaceutical treatment.