title: Standardization of FT4 and harmonization of TSH measurements: a request for input from endocrinologists and other physicians.
authors.affiliation: Laboratory for Analytical Chemistry, Mass Spectrometry Reference Laboratory, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium. linda.thienpont@ugent.be.
authors.forename: Linda M
authors.initials: LM
authors.lastname: Thienpont
authors.affiliation: Clinical Chemistry and Immunology, Montefiore Medical Center, New York, NY, USA. jfaix@montefiore.org.|Department of Pathology, Albert Einstein School of Medicine, New York, NY, USA. jfaix@montefiore.org.
authors.forename: James D
authors.initials: JD
authors.lastname: Faix
authors.affiliation: International Federation of Clinical Chemistry & Laboratory Medicine, Glasgow, UK. gbeastall@googlemail.com.
authors.forename: Graham
authors.initials: G
authors.lastname: Beastall
mesh_terms: D004704:Endocrinology / Q000592:standards*; D006801:Humans; D012015:Reference Standards; D013972:Thyrotropin / Q000097:blood*; D013974:Thyroxine / Q000097:blood*
chemical_list: D013972:Thyrotropin; D013974:Thyroxine