| 111274-7 | Thyroxine (T4) free |
| 14920-3 | Thyroxine (T4) free |
| 3024-7 | Thyroxine (T4) free |
| 35228-6 | Thyroxine (T4) free |
| 53349-7 | Thyroxine (T4) free (Dbs) |
| 53350-5 | Thyroxine (T4) free (Dbs) |
| 6892-4 | Thyroxine (T4) free (dialysis) |
| 70217-5 | Thyroxine (T4) free (dialysis) |
| 73557-1 | Thyroxine (T4) free in Cord blood |
| 83121-4 | Thyroxine (T4) free (immunoassay) |
| 83122-2 | Thyroxine (T4) free (immunoassay) |
| 98182-9 | Thyroxine (T4) free in Cord blood |