Fig 1 Publication of network meta-analysis articles over time. (a): Applied articles reporting a systematic reviews using network meta-analysis to compare at least four treatments published between 2005 and 2014, as assessed by Petropoulou et al 2017.⁹ *Six were also published before 2005, and 43 were published in 2015 up to April. (b): Methodological articles, tutorials, and articles with empirical evaluation of methods for network meta-analysis published between 2005 and 2014, as assessed by Efthimiou et al 2016¹⁰ and available from www.zotero.org/groups/wp4_-_network_meta-analysis