Control patients
| Control Subject | R1 | R2 | R3 |
|---|---|---|---|
| CP 1 | pos | pos | pos |
| CP 2 | neg | neg | neg |
| CP 3 | neg | neg | neg |
| CP 4 | neg | neg | neg |
| CP 5 | neg | pos | neg |
| CP 6 | neg | neg | neg |
| CP 7 | neg | neg | neg |
| CP 8 | neg | neg | neg |
| CP 9 | neg | neg | neg |
| CP 10 | neg | neg | neg |
| CP 11 | neg | neg | neg |
| CP 12 | neg | neg | neg |
| CP 13 | neg | neg | neg |
| CP 14 | neg | neg | neg |
| CP 15 | neg | neg | neg |
Note:—CP indicates control patient; pos, positive; neg, negative; R1, R2, R3, the interpretation of the venous distension sign by each reader for each patient.