Table 1.
Number of cases and controls per investigated region
| HP | MED | MTG | CG | PVC | PONS | MCX | PUT | SN | CB | |
| Controls | 14 | 15 | 15 | 15 | 16 | 14 | 16 | 13 | 18 | 16 |
| Cases | 15 | 15 | 15 | 15 | 15 | 8 | 15 | 8 | 15 | 12 |
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