title: Age-dependent reduction in serum melatonin concentrations in healthy human subjects.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D002648:Child; D002675:Child, Preschool; D002940:Circadian Rhythm; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008550:Melatonin / Q000097:blood*; D008875:Middle Aged; D011863:Radioimmunoassay; D012016:Reference Values; D012737:Sex Factors
chemical_list: D008550:Melatonin