ACTA1 and congenital myopathy with cores: Among the congenital myopathies in our study, we were able to exclude patients with SMA and muscular dystrophy based on their specific ICD-10 codes; however, we were unable to rule out conditions with XLMTM-like phenotypes, such as congenital myotonic dystrophy type 1 and ACTA1-variant congenital muscular dystrophy, due to the lack of specific ICD-10 codes for these diagnoses.