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)
treg decrease » the decrease (Expand search), urea decrease (Expand search), drugs decrease (Expand search)
decrease any » decrease and (Expand search), decreases and (Expand search), decreased and (Expand search)
any decrease » and decrease (Expand search), can decrease (Expand search), may decrease (Expand search)
decrease to » decreased to (Expand search), decrease toc (Expand search), decrease the (Expand search)

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease treg decrease any decrease ) OR ( decrease to decrease methods affected ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease treg decrease any decrease ) OR ( decrease to decrease methods affected ))*.