See reference lab website for details.
https://www.labcorp.com/tests/001974/thyroxine-t-sub-4-sub-free-direct
Aliases
Thyroxine (T4) Free Direct, Free T4 Direct Serum, Free Thyroxine, T4 Free Direct Serum, 1974, PN0014143
Specimen Type
See reference lab website for details.
https://www.labcorp.com/tests/001974/thyroxine-t-sub-4-sub-free-direct
Performing Laboratory
Labcorp