Renvoise B, Colasse S, Burlet P, Viollet L, Meier UT, Lefebvre S. The loss of the snoRNP chaperone Nopp140 from Cajal bodies of patient fibroblasts correlates with the severity of spinal muscular atrophy. Human Molecular Genetics. 2009 Jan 08;18(7):1181–9. doi: 10.1093/hmg/ddp009.