RT Journal Article SR Electronic T1 Method-related interference in thyroid function assays JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 57 OP 57 DO 10.7861/clinmedicine.19-2-s57 VO 19 IS Suppl 2 A1 Nancy Wassef A1 James Sheffield A1 Louise Ward A1 W Wassif YR 2019 UL http://www.rcpjournals.org/content/19/Suppl_2/57.abstract