Perhaps you should try some spelling variations:
significantly greatest » significantly greater (Expand Search), significantly related (Expand Search), significantly increases (Expand Search)
greatest decrease » treatment decreased (Expand Search), greater increase (Expand Search)
nn decrease » _ decrease (Expand Search), mean decrease (Expand Search), gy decreased (Expand Search)
a decrease » _ decrease (Expand Search), _ decreased (Expand Search), _ decreases (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: "\"((\\"significantly ((nn decrease) OR (a decrease))\\") OR (\\"significantly greatest decrease\\"))\"".
• Removing quotes may allow a broader search: (( significantly ((nn decrease) OR (a decrease)) ) OR ( significantly greatest decrease )).