31.   The Viagra sites alone differ dramatically in what health questions they ask, and what prices they charge.

n. + question >>共 832
ballot 2.96%
trivium 2.96%
referendum 2.07%
answer 2.07%
policy 1.95%
safety 1.91%
tax 1.58%
security 1.42%
health 1.26%
field 1.22%
health + n. >>共 369
official 11.61%
problem 9.34%
plan 6.38%
service 3.25%
authority 2.99%
benefit 2.89%
risk 2.84%
worker 2.42%
department 2.25%
expert 2.13%
question 0.14%
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