muscular atrophy signs and symptomsspinal muscular atrophy smn1novartis spinal muscular atrophysymptoms of atrophy musclessmn1 genediagnosis spinal muscular atrophyspinal muscular atrophy researchspinal muscular atrophy prognosisspinal muscular atrophy lifespanspinal muscular atrophy statisticsspinal muscular atrophy type 1adult spinal muscular atrophy
