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Basic characteristics of the study population
| Group | Number | Grade | Stricture diameter [cm] |
|---|---|---|---|
| Mild stenosis group | 9 | 1–2 | > 5 |
| Moderate stenosis group | 8 | 3 | 3 to 5 |
| Severe stenosis group | 6 | 4 | < 2 |
| Control group | 4 | - | — |
- Without dysphagia after esophagectomy. — With normal anastomotic stoma
