Perhaps you should try some spelling variations:
decreases decrease » decreases disease (Expand search), decreases breast (Expand search), diseases decreases (Expand search)
rats decreases » and decreases (Expand search), but decreases (Expand search), stress decreases (Expand search)
decrease after » disease after (Expand search)
decrease belt » decrease cell (Expand search), decrease akt (Expand search), decrease at (Expand search)
decrease rats » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)

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• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease AND decrease belt objects ) OR ( decrease rats decreases decrease after ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease AND decrease belt objects ) OR ( decrease rats decreases decrease after ))*.