the concentrations of igg subclass antibodies ( ab ) to acetylcholine receptor ( achr ) were quantified in 36 patients with myasthenia gravis ( mg ) treated with pyridostigmine only , and in eight patients who underwent thymectomy , using an igg subclass-specific immunoprecipitation assay .
C0026896
myasthenia gravis
C0034261
pyridostigmine