title: Variations in serum constituents.
mesh_terms: D000328:Adult; D001774:Blood Chemical Analysis; D001777:Blood Coagulation; D001800:Blood Specimen Collection / Q000592:standards; D006461:Hemolysis; D006801:Humans; D008297:Male; D005082:Physical Exertion; D011187:Posture; D013048:Specimen Handling / Q000592:standards*; D014111:Tourniquets