Perhaps you should try some spelling variations:
decrease iris » decrease risk (Expand search), decrease its (Expand search), decreased risk (Expand search)
iris patterns » risk patterns (Expand search), firing patterns (Expand search), drives patterns (Expand search)
decrease the » decreases the (Expand search), decrease in (Expand search), decrease of (Expand search)
the decrease » to decrease (Expand search), and decrease (Expand search)
decrease toc » decrease of (Expand search), decreased to (Expand search), decrease on (Expand search)
toc decrease » to decrease (Expand search), not decrease (Expand search), or decrease (Expand search)
decrease il » decreased il (Expand search), decrease in (Expand search), decrease hiv (Expand search)
il decrease » l decrease (Expand search), will decrease (Expand search), oil decreases (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 the decrease toc decrease ) OR ( decrease il decrease iris patterns ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease the decrease toc decrease ) OR ( decrease il decrease iris patterns ))*.