Perhaps you should try some spelling variations:
lesions decreased » lesions decrease (Expand search), lesions increase (Expand search), deletion decreased (Expand search)
decrease lesions » disease lesions (Expand search), decreased response (Expand search), decrease adhesion (Expand search)
decreased risk » increased risk (Expand search), decreased in (Expand search)
decrease that » decrease the (Expand search), decrease at (Expand search), decrees that (Expand search)
that decrease » that increase (Expand search), that increases (Expand search), not decrease (Expand search)
risk objects » risk subjects (Expand search), disk object (Expand search), first objects (Expand search)
decrease of » decrease in (Expand search)
of decrease » or decrease (Expand search), not decrease (Expand search), to decrease (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 of decrease that decrease ) OR ( decrease lesions decreased risk objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease of decrease that decrease ) OR ( decrease lesions decreased risk objects ))*.