[Normal electrocardiogram--differences between 13-14 year-olds and 20 year-olds].
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001824:Body Constitution; D004562:Electrocardiography; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D008297:Male; D009765:Obesity / Q000503:physiopathology; D012737:Sex Factors