Perhaps you should try some spelling variations:
during depressed » during depressive (Expand search), during repressive (Expand search), feeling depressed (Expand search)
decrease during » increase during (Expand search), increases during (Expand search), increased during (Expand search)
depressed urea » depressed area (Expand search), depressed areas (Expand search), depressed the (Expand search)
decrease liver » decreases liver (Expand search), decrease litter (Expand search), decrease after (Expand search)
urea decrease » urea increases (Expand search), the decrease (Expand search), or decrease (Expand search)
liver defects » linear defects (Expand search), layer defects (Expand search), liver affects (Expand search)
decrease to » decreased to (Expand search), decrease toc (Expand search), decrease the (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 during depressed urea decrease ) OR ( decrease to decrease liver defects ))~".
• Adding a wildcard symbol may retrieve word variants: (( decrease during depressed urea decrease ) OR ( decrease to decrease liver defects ))*.