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| Age of the lesion biopsied | Total cases | IgM | IgA | IgG | C3 |
| <48 hours | 32 | 4 | 17 | 1 | 10 |
| 48-72 hours | 10 | 0 | 3 | 0 | 3 |
| >72 hours | 3 | 1 | 1 | 1 | 2 |
| Total | 45 | 5 (10.0) | 21 (42.0) | 2 (4.0) | 15 (30.0) |
