The S&P 500 soared more than 32% in 2013, and several big pharma companies also soared. Some, however -- namely Sanofi (SNY 1.20%), Novo Nordisk (NVO -3.07%), and Eli Lilly (LLY -1.94%) -- significantly trailed their peers. To find out why these stocks stumbled last year, and what they need to do to soar this year, click on the following slideshow.