title: Preliminary observations on long-term muscle force changes in the post-polio syndrome.
mesh_terms: D006801:Humans; D007537:Isometric Contraction; D009132:Muscles / Q000503:physiopathology*; D009468:Neuromuscular Diseases / Q000209:etiology / Q000503:physiopathology*; D011051:Poliomyelitis / Q000150:complications* / Q000503:physiopathology; D011446:Prospective Studies; D013577:Syndrome