needle biopsies from vastus lateralis in untreated hypothyroid patients with muscle weakness confirmed by quadriceps force measurements ( n = 11 ) were repeated when the patients had taken l-thyroxine for a mean period of 9.2 months ( range 5.3-13.3 months , n = 8 ) and had been continuously biochemically euthyroid for a mean period of 4.9 months ( range 2-11 months ) .
C0020676
hypothyroid
C0040165
thyroxine