Preparation of thyroxine (T4) and triiodothyroxine (T3) free serum avoiding charcoal fines.
D001769:Blood; D002606:Charcoal; D006801:Humans; D013974:Thyroxine / Q000097:blood*; D014284:Triiodothyronine / Q000097:blood*
D014284:Triiodothyronine; D002606:Charcoal; D013974:Thyroxine