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Demographic data.
| Control group (n = 6) | Collagen membrane group (n = 6) | P value | |
|---|---|---|---|
| Sex (male: female) | 2:4 | 2:4 | 1.0 |
| Weight at first operation: kg, mean (minimum-maximum) | 9.67 (4-16) | 9.33 (5-19) | .91 |
| Weight at second operation: kg, mean (minimum-maximum) | 35.17 (21-55) | 32.50 (21-50) | .69 |
| Duration between first and second surgeries: days, mean (minimum-maximum) | 65.67 (44-90) | 63.67 (56-85) | .88 |
