Fig. 2.

Impact of Journals that published hESC research papers from 2007 to 2011. a Overall average Five Year Impact Factors 2010 for hESC research papers published from 2007 to 2011. Data for those 13 countries that contributed more than 30 studies to the hESC research field in this period are shown individually, data for the remaining 22 nations that contributed to hESC research are merged in “others”. b Average Five Year Impact Factors 2010 for hESC research papers from US and non-US-based groups for individual years