Perhaps you should try some spelling variations:
decrease litter » increased litter (Expand search), decrease after (Expand search), decreases liver (Expand search)
litter decrease » faster decrease (Expand search), life decrease (Expand search)
decrease lesion » decrease adhesion (Expand search), decrease asian (Expand search), decrease soon (Expand search)
lesion patterns » lesion pattern (Expand search), design patterns (Expand search), lesions pattern (Expand search)
decrease rate » decreased rate (Expand search), decreases rate (Expand search), decrease at (Expand search)
rate decrease » rats decreases (Expand search), rate increase (Expand search), to decrease (Expand search)

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

• Removing quotes may allow a broader search: (( decrease litter decrease rate decrease ) OR ( decrease AND decrease lesion patterns ))~.