| PTL | peritoneal telencephalic leukoencephalomyopathy; pharyngotracheal lumen; plasma thyroxine level post... |
|---|---|
| T4 | thyroxine |
| T-7 | free thyroxine factor |
| T4(C) | serum thyroxine measured by column chromatography |
| T4(D) | serum thyroxine measured by displacement analysis |