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| Risk Factors | Percentage (Range) |
|---|---|
| Sex, Male | 2.4 (1.8-3.2) |
| Maritus status, Married | 2.1 (1.4-3.2) |
| Extramarital Sex | 6.5 (1.4-30.0) |
| Intravenous Drug Abuse | 5.5 (1.2-25.3) |
| High Risk Job | 2.4 (1.5-4.0) |
