Perhaps you should try some spelling variations:
significantly improved » significantly increased (Expand Search)
significantly related » significantly correlated (Expand Search), significantly reduced (Expand Search), significantly greater (Expand Search)
improved decrease » improved urease (Expand Search), marked decrease (Expand Search)
related decrease » related disease (Expand Search), greater decrease (Expand Search), related diseases (Expand Search)

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

• Removing quotes may allow a broader search: (( significantly improved decrease ) OR ( significantly related decrease ))~.