_:vb50944620 "url:https://www.ncbi.nlm.nih.gov/pubmed/12566046"^^ . _:vb50944620 . _:vb50944620 "A syndrome characterized by visual loss and sensorineural hearing loss with onset in childhood and associated with other symptoms including; progressive external ophthalmoplegia, muscle cramps, hyperreflexia, and ataxia that has_material_basis_in heterozygous mutation in OPA1 on chromosome 3q29."^^ . _:vb50944620 . _:vb50944620 . _:vb50944620 . _:vb50944620 "url:https://www.ncbi.nlm.nih.gov/pubmed/20157015"^^ . _:vb50944620 .