title: Principles and pitfalls in establishing normal electrocardiographic limits.
mesh_terms: D000704:Analysis of Variance; D003951:Diagnostic Errors; D004562:Electrocardiography; D006331:Heart Diseases / Q000175:diagnosis; D006801:Humans; D008403:Mass Screening; D011159:Population Surveillance; D012494:Sampling Studies; D013223:Statistics as Topic; D014481:United States