Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Oxycodone:

"

Oxycodone has a volume of distribution of 2.6L/kg,[1] in the blood it is distributed to skeletal muscle, liver, intestinal tract, lungs, spleen, and brain.[2] Conventional oral preparations start to reduce pain within 10 to 15 minutes on an empty stomach; in contrast, OxyContin starts to reduce pain within one hour.[3]