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Inclusion and exclusion criteria
| Inclusion criteria |
| Primary ACL reconstruction |
| ACL reconstruction using hamstring tendon autograft |
| Single- or double-bundle ACL reconstruction |
| Exclusion criteria |
| Date of index surgery before January 1, 2007 |
| Use of graft type other than hamstring tendon autograft |
| Age <13 years |
| Concomitant fracture |
| Concomitant nerve- or vessel injury |
| Concomitant ligament injury |
| Combined ACL reconstruction performed |
