title: Letter: On muscle biopsy.
mesh_terms: D000251:Adenosine Triphosphatases / Q000032:analysis; D001706:Biopsy / Q000379:methods*; D005615:Freezing; D006651:Histocytochemistry / Q000379:methods; D006801:Humans; D008854:Microscopy, Electron; D009132:Muscles / Q000473:pathology*; D009135:Muscular Diseases / Q000175:diagnosis*
chemical_list: D000251:Adenosine Triphosphatases