title: Circadian variations of plasma testosterone and estrogens in normal men. A study by frequent sampling.
mesh_terms: D015068:17-Ketosteroids / Q000652:urine; D000328:Adult; D000704:Analysis of Variance; D000818:Animals; D002852:Chromatography, Ion Exchange; D002940:Circadian Rhythm; D004958:Estradiol / Q000097:blood*; D004970:Estrone / Q000097:blood*; D005069:Evaluation Studies as Topic; D006801:Humans; D008297:Male; D008722:Methods; D011817:Rabbits / Q000276:immunology; D011863:Radioimmunoassay; D013739:Testosterone / Q000097:blood*; D013997:Time Factors; D014316:Tritium
chemical_list: D015068:17-Ketosteroids; D014316:Tritium; D004970:Estrone; D013739:Testosterone; D004958:Estradiol