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Summary of clinical and molecular data for affected matrilineal relatives of four Chinese families with LHON.
| Subjects | Gender | Age of test (yrs) | Age of onset (yrs) | Visual acuity Right | Visual acuityLeft | Level of visual impairment | Number of matrilineal relatives | mtDNA haplogroup |
|---|---|---|---|---|---|---|---|---|
| WZ98-III-5 | F | 14 | 14 | 0.1 | 0.1 | Mild | 17 | D4b2 |
| WZ99-III-1 | M | 21 | 21 | 0.1 | 0.06 | Moderate | 10 | M9a |
| WZ100-III-9 | M | 14 | 14 | 0.05 | 0.03 | Severe | 12 | M9a |
| WZ101-IV-8 | M | 6 | 1 | 0.4 | 0.1 | Mild | 15 | M9a |
