Results from ten-year retrospective analysis of experiments performed prospectively. The term 'non-reproduced' was assigned on the basis of findings not being sufficiently robust to drive a drug-development programme.
http://www.nature.com/nature/journal/v483/n7391/fig_tab/483531a_T1.html
http://www.nature.com/nature/journal/v483/n7391/fig_tab/483531a_T1.html