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Unclear identification cases (19/171)
| Right upper lobe: 10/35 | 29% |
| S1: 3, S2: 4, S1 + S2: 1, S1a + S2: 1, S1b + S2: 1 | |
| Right lower lobe: 2/48 | 4% |
| S7: 1, S9 + S10: 1 | |
| Left upper lobe: 4/53 | 8% |
| S1 + 2: 1, S3: 1, S1 + 2 + S3: 2 | |
| Left lower lobe: 3/35 | 9% |
| S6: 1, S8 + S9 + S10: 1, S9 + S10: 1 |
P = 0.0028 by χ2 test.
