muscular atrophy signs and symptomsmuscular apathysymptoms of atrophy musclesmuscular dystrophy atrophysystemic muscular atrophyspinal muscular atrophy researchspinal muscular atrophy statisticsdiagnosis spinal muscular atrophyspinal muscular atrophy prognosisspinal muscular atrophy lifespanspinal muscular atrophy type 1adult spinal muscular atrophy
