Table 3. Distribution of the number of cases with the stage of the disease.
| Stage | Number of cases |
| 1a | 0 |
| 1b | 6 (19.3%) |
| 2a | 6 (19.3%) |
| 2b | 1 (3.2%) |
| 3a | 5 (16.1%) |
| 3b | 10 (32.2%) |
| 4a | 3 (9.6%) |
| 4b | 0 |
| Total | 31 |
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