TY - EJOUR T1 - A Convenient and Efficient Method for the Extraction and Fractionation of Steroid Hormones from Serum or Urine AU - Schöneshöfer, M. AU - Fenner, A. PY - 1981 LA - und PB - Kooperation de Gruyter JO - Clinical Chemistry and Laboratory Medicine DO - 10.1515/cclm.1981.19.2.71 ER -