Does sampling site influence levels of free thyroxine and thyrotropin determined by a current immunoassay?
Rondeel
Jan M M
JM
Isala Klinieken, Department of Clinical Chemistry, P.O. Box 10400, 8000 GK Zwolle, The Netherlands. j.rondeel@isala.nl
Albers
Jaldira S
JS
Schroor
Eelco J
EJ
Schindhelm
Roger K
RK