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Demographic characteristics
| Number of volunteers | 12 |
| Male : female gender | 6:6 |
| Mean age in years ± SD (range) | 27 ± 6 (19–37) |
| Race, n (%) | |
| Black | 6 (50) |
| Caucasian | 4 (33) |
| Hispanic or Latino | 2 (17) |
| Mean height in cm ± SD (range) | 169.0 ± 9.0 (154.5–180.5) |
| Mean weight in kg ± SD (range) | 70.7 ± 6.4 (63.0–84.1) |
SD = standard deviation.
