TY - EJOUR T1 - An External Quality Control Survey (EQCS) for Serum Cortisol AU - Wood, W. G. AU - Bauer, M. AU - Marschner, I. AU - Scriba, P. C. PY - 1980 LA - und PB - Kooperation de Gruyter JO - Clinical Chemistry and Laboratory Medicine DO - 10.1515/cclm.1980.18.3.183 ER -