Perhaps you should try some spelling variations:
decrease lesions » disease lesions (Expand search), decreased response (Expand search), decrease adhesion (Expand search)
lesions case » lesion case (Expand search), lesions caused (Expand search), lesions based (Expand search)
risk objects » risk subjects (Expand search), disk object (Expand search), first objects (Expand search)
in decrease » in decreased (Expand search), on decrease (Expand search), pain decrease (Expand search)
case risk » care risk (Expand search), base risk (Expand search), lapse risk (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 AND decrease in decrease ) OR ( decrease lesions case risk objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease AND decrease in decrease ) OR ( decrease lesions case risk objects ))*.