Perhaps you should try some spelling variations:
methods affected » methods affect (Expand search), methods effect (Expand search), method affects (Expand search)
decrease methods » defense methods (Expand search), disease methods (Expand search), dense methods (Expand search)
decrease treg » decrease the (Expand search), decrease their (Expand search), decrease toc (Expand search)
treg decrease » the decrease (Expand search), urea decrease (Expand search), drugs decrease (Expand search)
decrease and » decreases and (Expand search), decrease of (Expand search), decrease the (Expand search)
and decrease » and decreases (Expand search), and decreased (Expand search), and increase (Expand search)
in decrease » in decreased (Expand search), can decrease (Expand search), via decrease (Expand search)

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease AND decrease treg decrease ) OR ( decrease in decrease methods affected ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease and decrease treg decrease ) OR ( decrease in decrease methods affected ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease and decrease treg decrease ) OR ( decrease in decrease methods affected ))*.