Nexavar. Bayer HealthCare Pharmaceuticals. Accessed June 26, 2015 from http://www.nexavar-us.com/?ecid=NexUS:ps:de:psl:psl:42115:100057&gclid=CMv_0ay-rcYCFUQvgQodUYwDXA
Sorafenib. Micromedex System. Truven Health Analytics. Accessed 6/27/15 from http://www.thomsonhc.com/micromedex2/