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| Study | randomization | Allocation concealment | blindness | result | score |
|---|---|---|---|---|---|
| FinXX | 2 | 1 | 0 | 1 | 4 |
| USON | 1 | 1 | 0 | 1 | 3 |
| Shao Z | 2 | 1 | 0 | 0 | 3 |
| Ohno S | 1 | 1 | 0 | 1 | 3 |
| GeparQuattro | 1 | 1 | 0 | 1 | 3 |
| NSABP B-40 | 2 | 1 | 0 | 1 | 4 |
| ABCSG-24 | 2 | 1 | 0 | 1 | 4 |
