Rats are constantly volunteering for clinical studies to get free drugs

By April 21, 2011 11:28 am ET ET

Rats are constantly volunteering for clinical studies to get free drugs

INDIANAPOLIS, IN – FEBRUARY 27: Ryan Mallett #9 of Arkansas looks on at the 2011 NFL Scouting Combine at Lucas Oil Stadium on February 27, 2011 in Indianapolis, Indiana. (Photo by Joe Robbins/Getty Images)

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