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Incidence of severe chronic GVHD after HSCT depending on number of risk factors (RF) and inclusion of anti-thymocyte globulin (ATG) or not in the conditioning therapy. Only factors known at time of transplantation were analyzed
| Severe cGVHD | ATG (%) | No ATG (%) | p value |
|---|---|---|---|
| 1 RF | 4 | 6 | NS |
| 2 RF | 4 | 24 | < 0.001 |
| 3 RF | 7 | 40 | 0.01 |
