Perhaps you should try some spelling variations:
decrease fetal » decrease fear (Expand search), decrease renal (Expand search), decrease total (Expand search)
decrease toc » decrease the (Expand search), decreased to (Expand search), decrease on (Expand search)
toc decrease » to decrease (Expand search), the decrease (Expand search), not decrease (Expand search)
decrease of » decrease in (Expand search)
of decrease » not decrease (Expand search), to decrease (Expand search), of decree (Expand search)
decrease or » decrease on (Expand search), decrease pro (Expand search), decrease in (Expand search)
or decrease » not decrease (Expand search), to decrease (Expand search), _ decrease (Expand search)
fetal dose » total dose (Expand search), fetal bone (Expand search), fetal doi (Expand search)

You may be able to get more results by adjusting your search query.

• Removing quotes may allow a broader search: (( decrease of decrease toc decrease ) OR ( decrease or decrease fetal dose ))~.