Perhaps you should try some spelling variations:
decrease ligand » decrease and (Expand search), decrease lipid (Expand search), decrease lodging (Expand search)
with professors » with professor (Expand search), the professors (Expand search), with professionals (Expand search)
ligand release » ligament release (Expand search), and release (Expand search), demand release (Expand search)
decrease with » decreases with (Expand search), increase with (Expand search), decrease in (Expand search)
decrease of » decrease in (Expand search)
of decrease » or decrease (Expand search), not decrease (Expand search), to 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 of decrease with professors ) OR ( decrease ligand release _ decrease ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease of decrease with professors ) OR ( decrease ligand release _ decrease ))*.