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| Characteristics | Values (n = 46) | 10 day challenge group (n = 26) | 90 day challenge group (n = 20) |
|---|---|---|---|
| Gender (male) (%) | 31 (67) | 17 (65) | 14 (70) |
| Median age in years (25th, 75th centile) | 31 (29, 38) | 31 (28, 33) | 33.5 (29, 43) |
| Blood group O (%) | 24 (52) | 11 (42) | 13 (65) |
