21.   The research is focused on new treatment methods for the Helicobacter pylori bacterium, which is viewed as one of the causal factors behind the development of peptic ulcers.

n. + method >>共 767
production 3.90%
research 3.08%
interrogation 1.71%
construction 1.71%
business 1.66%
detection 1.30%
survey 1.24%
treatment 1.24%
police 1.18%
prevention 1.12%
treatment + n. >>共 298
plant 16.32%
program 15.38%
center 12.81%
facility 5.65%
option 4.62%
plan 2.73%
system 2.09%
group 1.78%
room 1.58%
decision 1.54%
method 0.83%
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