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 need » decreased feed (Expand search), decreased level (Expand search), decreased sleep (Expand search)
decrease urea » decrease treg (Expand search), decrease burden (Expand search), decreases areas (Expand search)
urea decrease » urea increases (Expand search), the decrease (Expand search), or decrease (Expand search)
need objects » naked objects (Expand search), typed objects (Expand search), field objects (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 urea decrease OR decrease ) OR ( decrease their decreased need objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease urea decrease OR decrease ) OR ( decrease their decreased need objects ))*.