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Laboratory characteristics of patients with TTP:
| Test | Result |
|---|---|
| Hematocrit (%) | 17 |
| Platelet count (× 109/L) | 24 |
| Creatinine (mg/dL) | 1.6 |
| Lactate dehydrogenase (IU/L) | 1225 |
| Blood type | |
| O positive/negative (% of total) | 20 (59) |
| A positive/negative (% of total) | 9 (26) |
| B positive/negative (% of total) | 5 (15) |
