TY  - RPRT
TI  - Free thyroxine index.
AU  - F Clark
AU  - H J Brown
PY  - 1970
DO  - 10.1136/bmj.2.5708.543-a
UR  - https://pubmed.ncbi.nlm.nih.gov/4987899/
ID  - 4987899
ER  -