Preparation of Control Sera for Fractionation of Lipoproteins in Human Serum: Compamtive Study of Liquid Nitrogen Frozen and Wieland's Methods - SATO, JUNKO; IRI, HISAMI; TSUKAMOTO, HIDEKO; TODOROKI, TORU; MATSUMOTO, KOJIRO; KANO, SHOJIRO; SAIDA, YUKO; MIZOGUCHI, KAYOKO (Japanese Journal of Clinical Chemistry, 1988)