| involve blood vessels | 0.77 |
| occur in arterial or ve… | 0.63 |
| be a blood clot | 0.33 |
| affect thousand | 0.31 |
| take oral contraceptives | 0.31 |
| take traveler | 0.31 |
| filter 820 | 0.25 |
| spare collateral veins | 0.25 |
| extend to collateral ve… | 0.16 |
| acute myocardial infarc… | 0.25 |
| chronic blockage | 0.16 |
| stroke | 0.59 |
| death | 0.54 |
| heart attack | 0.41 |
| term swelling | 0.16 |
| skin | 0.13 |
| suspected | 0.54 |
| identified by ct | 0.25 |
| checked | 0.25 |
| induced by norethistero… | 0.16 |
| used by patient | 0.16 |