Perhaps you should try some spelling variations:
decreased lesions » decreased response (Expand search), decreased levels (Expand search), decreased neuron (Expand search)
lesions decrease » response decrease (Expand search), lesions case (Expand search)
decrease pain » decreases pain (Expand search), decrease in (Expand search), decreased brain (Expand search)
pain decrease » can decrease (Expand search), taping decrease (Expand search), brain decreases (Expand search)
on decreased » in decreased (Expand search), of decreased (Expand search), on deceased (Expand search)
decrease and » decreases and (Expand search), decrease in (Expand search), decrease of (Expand search)
decrease on » decrease in (Expand search), decrease of (Expand search), decrease or (Expand search)
and objects » and object (Expand search), and subjects (Expand search), and objectives (Expand search)

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( decrease on decreased lesions decrease ) OR ( decrease pain decrease AND objects ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( decrease on decreased lesions decrease ) OR ( decrease pain decrease and objects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease on decreased lesions decrease ) OR ( decrease pain decrease and objects ))*.