title: Circadian heart rate rhythmicity in natives living at high altitude.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000531:Altitude; D002940:Circadian Rhythm; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged