Perhaps you should try some spelling variations:
decrease shadowing » decrease owing (Expand search), decrease following (Expand search), decreases shedding (Expand search)
decrease lesions » disease lesions (Expand search), decreased response (Expand search), decrease adhesion (Expand search)
lesions decrease » response decrease (Expand search), lesions case (Expand search)
shadowing effect » shadowing effects (Expand search), shading effect (Expand search), shading effects (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
the decrease » to decrease (Expand search), and decrease (Expand search)
decrease by » decreased by (Expand search), decrease in (Expand search), decrease of (Expand search)
by decrease » by decreased (Expand search), may decrease (Expand search), any 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 the decrease lesions decrease ) OR ( decrease by decrease shadowing effect ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease the decrease lesions decrease ) OR ( decrease by decrease shadowing effect ))*.