Alpers syndrome "progressive sclerosing poliodystrophy (disorder)" EXACT [SNOMEDCT_2005_07_31:20415001] UMLS_CUI:C0205710 OMIM2009_05_01:203700 NCI2009_04D:C35257 URI: http://www.ebi.ac.uk/cellline#Alpers_syndrome "Alpers' disease or gray-matter degeneration" EXACT [MTHICD9_2006:330.8] "Alper's syndrome" EXACT [NCI2004_11_17:C35257] SNOMEDCT_2010_1_31:20415001 cerebral degeneration syndrome