TY - RPRT TI - Biologic variation is important for interpretation of thyroid function tests. AU - Stig Andersen AU - Niels Henrik Bruun AU - Klaus Michael Pedersen AU - Peter Laurberg PY - 2003 DO - 10.1089/105072503770867237 UR - https://pubmed.ncbi.nlm.nih.gov/14651790/ ID - 14651790 ER -