Perhaps you should try some spelling variations:
significantly greatest » significantly greater (Expand Search), significantly related (Expand Search), significantly increases (Expand Search)
significantly lower » significantly higher (Expand Search)
greatest decrease » treatment decreased (Expand Search), greater increase (Expand Search)
lower decrease » larger decrease (Expand Search), linear decrease (Expand Search), teer decrease (Expand Search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( significantly greatest decrease ) OR ( significantly lower decrease )).