Perhaps you should try some spelling variations:
their decreased » the decreased (Expand search), the decrease (Expand search), tumors decreased (Expand search)
decrease their » decrease the (Expand search), increase their (Expand search), decreases the (Expand search)
decreased base » decreased bone (Expand search), decreased brain (Expand search), decreased risk (Expand search)
decrease treg » decrease the (Expand search), increase treg (Expand search)
treg decrease » the decrease (Expand search), urea decrease (Expand search), drugs decrease (Expand search)
in decrease » in decreased (Expand search), on decrease (Expand search), pain decrease (Expand search)
base object » based object (Expand search), bare object (Expand search), same object (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 in decrease treg decrease ) OR ( decrease their decreased base object ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease in decrease treg decrease ) OR ( decrease their decreased base object ))*.