Pantothenate Kinase - Associated Neurodegeneration (PKAN)Emedicine.Medscape Sept, Hanna, P.A. & Benbadis, S.R., 2018
Acquired Ocular Visual Impairment in Children, 1960-1989Am J Dis Child 147:325-328, Robinson,G.C.&Jan,J.E., 1993