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_:vb50939491	<http://www.w3.org/2002/07/owl#annotatedTarget>	"A syndrome characterized by degenerative and proliferative changes of the neuroretina resulting in congenital blindness along with progressive mental disorders in about 50% of patients and sensorineural deafness in about 33% of patients, and that has_material_basis_in mutation in the NDP gene on chromosome Xp11."^^<http://www.w3.org/2001/XMLSchema#string> .
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