A Re-Analysis of the Cochrane Library Data: The Dangers of Unobserved Heterogeneity in Meta-Analyses Kontopantelis, Evangelos ; Springate, David A. ; Reeves, David Abstract Publication: PLoS ONE Pub Date: July 2013 DOI: 10.1371/journal.pone.0069930 Bibcode: 2013PLoSO...869930K