Perhaps you should try some spelling variations:
during depressed » during depressive (Expand search), during repressive (Expand search), feeling depressed (Expand search)
at preprocessing » data preprocessing (Expand search), and preprocessing (Expand search), by preprocessing (Expand search)
decrease during » increase during (Expand search), increases during (Expand search), increased during (Expand search)
depressed at » depressed and (Expand search), expressed at (Expand search), depressed nk (Expand search)
or decrease » of decrease (Expand search), not decrease (Expand search), _ decrease (Expand search)
decrease or » decrease of (Expand search), decrease on (Expand search), decrease pro (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.

• Removing quotes may allow a broader search: (( decrease during depressed at preprocessing ) OR ( decrease or decrease to decrease ))~.