title: Effect of silicone-separator tubes and storage time on ionized calcium in serum.
mesh_terms: D000293:Adolescent; D000328:Adult; D001774:Blood Chemical Analysis / Q000295:instrumentation; D001800:Blood Specimen Collection / Q000295:instrumentation; D002118:Calcium / Q000097:blood*; D006801:Humans; D008875:Middle Aged; D012828:Silicones
chemical_list: D012828:Silicones; D002118:Calcium