Carson VJ, Puffenberger EG, Bowser LE, Brigatti KW, Young M, Korulczyk D, Rodrigues AS, Loeven KK, Strauss KA. Spinal muscular atrophy within Amish and Mennonite populations: Ancestral haplotypes and natural history. PLoS One. 2018; 13(9):e0202104.