11.   Most marrow donors are Caucasian.

n. + donor >>共 103
aid 21.29%
blood 15.93%
organ 14.85%
campaign 7.96%
egg 5.67%
sperm 4.13%
kidney 1.84%
marrow 1.68%
bone-marrow 1.38%
minority 1.23%
marrow + n. >>共 29
transplant 32.98%
cell 14.89%
donor 11.70%
bone 5.32%
experiment 3.19%
change 2.13%
donation 2.13%
drive 2.13%
flan 2.13%
slice 2.13%
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