Characteristics of included studies.

<p>CRDC = Chart Review, Diagnostic Criteria – the charts of potential cases were reviewed, and a formal set of diagnostic criteria were applied when evaluated cases.</p><p>CRMD = Chart Review, Medical Doctor – the charts of potential cases were reviewed by a physician, who evaluated cases using their clinical judgement or an otherwise unspecified set of criteria.</p><p>AHA = American Heart Association; MONICA = MONItoring Trends and Determinants in CArdiovascular Disease; WHO = World Health Organization.