Muscle Ultrasound Changes Correlate With Functional Impairment in Spinal Muscular Atrophy - Moreira, Ana Lucila; Mendonça, Rodrigo de Holanda; Polido, Graziela Jorge; Oliveira, Marcos Castello Barbosa de; Silva, André Macedo Serafim da; Zanoteli, Edmar (Ultrasound in medicine and biology, 2023)