| Non-volunteers (n = 9) | Volunteers (n = 11) | ||
---|---|---|---|---|
Age, mean [SD] | 34.0 [9.9] | 36.8 [15.1] | ||
n | % | n | % | |
Sex | ||||
 Male | 3 | (33.3) | 3 | (27.3) |
 Female | 6 | (66.7) | 8 | (72.7) |
County of citizenship | ||||
 Western | 1 | (11.1) | 4 | (36.4) |
 Asia | 5 | (55.6) | 4 | (36.4) |
 Other | 3 | (33.3) | 3 | (27.3) |