Fentanyl was first developed in 1959 and introduced in the 1960s as an intravenous anesthetic.
from Yahoo News - Latest News & Headlines https://ift.tt/2OVrx3X
Fentanyl was first developed in 1959 and introduced in the 1960s as an intravenous anesthetic.
from Yahoo News - Latest News & Headlines https://ift.tt/2OVrx3X
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