Perhaps you should try some spelling variations:
decreased mortality » decreases mortality (Expand search), increased mortality (Expand search), increases mortality (Expand search)
mortality based » mortality caused (Expand search), mortality and (Expand search), reality based (Expand search)
decrease owing » decrease lodging (Expand search), decrease during (Expand search), decrease with (Expand search)
owing decrease » taping decrease (Expand search), will decrease (Expand search), skins decrease (Expand search)
at decreased » rats decreased (Expand search), and decreased (Expand search), are decreased (Expand search)
in decrease » in decreased (Expand search), on decrease (Expand search), pain decrease (Expand search)
decrease at » decrease akt (Expand search), decrease and (Expand search), decrease of (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 owing decrease in decrease ) OR ( decrease at decreased mortality based ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease owing decrease in decrease ) OR ( decrease at decreased mortality based ))*.