Perhaps you should try some spelling variations:
decrease metabolic » decreases metabolic (Expand search), increase metabolic (Expand search), increases metabolic (Expand search)
decrease lesions » disease lesions (Expand search), decreased response (Expand search), decrease adhesion (Expand search)
lesions decrease » response decrease (Expand search), lesions case (Expand search)
decrease risk » decreased risk (Expand search), increase risk (Expand search), decrease in (Expand search)
risk decrease » risk decreases (Expand search), risk increase (Expand search), break decrease (Expand search)
decrease hiv » decrease in (Expand search), decrease their (Expand search), decreased high (Expand search)
hiv decrease » via decrease (Expand search), hiv increase (Expand search), will decrease (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: "(( decrease risk decrease lesions decrease ) OR ( decrease hiv decrease metabolic effects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease risk decrease lesions decrease ) OR ( decrease hiv decrease metabolic effects ))*.