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| Number of controls per case | Number of cases | Number of controls in total | Number of total (cases+controls) |
|---|---|---|---|
| 10 | 472 | 4720 | 5191 |
| 9 | 12 | 108 | 120 |
| 7 | 1 | 7 | 8 |
In the control group 15 individuals received no data due to inaccurate personal identification numbers.
