| remain open | 0.39 |
| last for many years | 0.35 |
| take one to four months | 0.35 |
| occur at either the ova… | 0.32 |
| take a number of weeks | 0.25 |
| insert large dialysis n… | 0.25 |
| produce high pressures | 0.25 |
| joining an artery | 0.37 |
| high blood flow | 0.16 |
| the vasculature | 0.16 |
| infection | 0.16 |
| kidney disease | 0.16 |
| hemodialysis | 0.45 |