Labels:chat room | door | sky OCR: CAUSES OFALOW SERUMT IN CLINICALLY EUTHYROID PATIENTS low TBG severe hypoproteinaemia drugs normal TSH hereditary normal TBG severe non-thyroid lillness drugs e.g. aspirin, phenytoin normal TSH (diphenylhydantoin) normal TBG autoimmune thyroiditis raised 'subclinical hypothyroid' or raised TSH 'compensated euthyroid' antibody tve illness norma