Links
[1] https://disorders.eyes.arizona.edu/disorders/friedreich-ataxia-1
[2] http://omim.org/entry/229300
[3] https://disorders.eyes.arizona.edu/disorders/spastic-ataxia-4-mtpap-deficiency
[4] http://omim.org/entry/613672
[5] https://disorders.eyes.arizona.edu/disorders/spastic-ataxia-optic-atrophy-mental-retardation
[6] http://omim.org/entry/270500?search=optic%20atrophy%20mental%20retardation&highlight=atrophy%20retardation%20mental%20optic
[7] https://disorders.eyes.arizona.edu/references/hereditary-spastic-ataxia-congenital-miosis-four-cases-one-family
[8] https://disorders.eyes.arizona.edu/references/hereditary-ataxia-series-twenty-one-cases