Kenny Long, a graduate researcher studying engineering and medicine at the University of Illinois, Urbana-Champaign works with a handheld biosensor based on an iPhone, is shown in this June 21, 2013 ... more 
Kenny Long, a graduate researcher studying engineering and medicine at the University of Illinois, Urbana-Champaign works with a handheld biosensor based on an iPhone, is shown in this June 21, 2013 photo in Urbana, Ill. (AP Photo/Michael Conroy) less 
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Associated Press | Photo By Michael Conroy
Thu, Aug 1, 2013 3:03 AM EDT