subacute sclerosing panencephalitis,"['SSPE', 'inclusion body encephalitis', 'subacute inclusion body encephalitis', 'sclerosing leukoencephalitis', 'subacute sclerosing leukoencephalitis', ""Bosin's disease"", ""Dawson's encephalitis"", 'Van Bogaert encephalitis', 'panencephalitis ']"