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Causes of the reported 29 cases
| Cause | IMA injury |
|
| Case number | Percentage (%) | |
| Motorcycle collision | 9 | 31.0 |
| Automobile collision | 4 | 13.8 |
| MCWAP | 1 | 3.4 |
| Rugby tackle | 1 | 3.4 |
| Multiple explosive injury | 1 | 3.4 |
| Jump from a 40-foot wall | 1 | 3.4 |
| Soccer game collision | 1 | 3.4 |
| Pounding chest | 3 | 10.3 |
| Traffic accident | 3 | 10.3 |
| Hit by a heavy burden | 2 | 6.9 |
| Fell from a height | 3 | 10.3 |
IMA: internal mammary artery; MCWAP: midair collision with another parachutist
