v. + surgery >>共 273
undergo 39.19%
have 25.34%
perform 5.72%
require 5.67%
need 5.14%
follow 3.34%
do 1.30%
bypass 0.74%
avoid 0.73%
schedule 0.59%
require + n. >>共 1156
approval 9.04%
surgery 3.45%
treatment 1.89%
attention 1.37%
lot 1.31%
change 1.25%
disclosure 1.14%
action 1.08%
use 0.84%
stitch 0.79%
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