Siliconized vs nonsiliconized evaluated blood-collection tubes for free thyroxin measurements.
D001800:Blood Specimen Collection / Q000295:instrumentation*; D006801:Humans; D011863:Radioimmunoassay / Q000592:standards; D012828:Silicones; D013974:Thyroxine / Q000097:blood*
D012828:Silicones; D013974:Thyroxine