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Results of real-time PCR analysis of plasma following storage for various time periods and at different temperatures
| Storage time | Temperature | |||
|---|---|---|---|---|
| 4 °C | − 20 °C | − 40 °C | − 80 °C | |
| 14 days | 100% | 100% | 100% | 100% |
| 28 days | 90% | 100% | 100% | 100% |
| 42 days | 30% | 100% | 100% | 100% |
| 3 months | na | 100% | 100% | 100% |
| 6 months | na | 100% | 100% | 100% |
| 12 months | na | 100% | 100% | 100% |
Abbreviation: na, no detection
