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. 2017 Aug 17;8:106. doi: 10.3389/fgene.2017.00106

Figure 1.

Figure 1

Timeline of the major studies and tissues analysed for global or targeted DNA methylation in this review. Studies are age-associated except where indicated. Superscripts: ∧(captive raised or model studies) and *(wild animal studies). (1, Grönniger et al., 2010; 2, Teschendorff et al., 2010; 3, Maegawa et al., 2010; 4, Bocklandt et al., 2011; 5, Koch and Wagner, 2011; 6, Garagnani et al., 2012; 7, Horvath, 2013; 8, Hannum et al., 2013; 9, Gryzinska et al., 2013; 10, Polanowski et al., 2014; 11, Shimoda et al., 2014; 12, Sun et al., 2014; 13, Nätt et al., 2014; 14, Andraszek et al., 2014; 15, Bekaert et al., 2015; 16, Yan et al., 2015; 17, Nilsen et al., 2016; 18, Spiers et al., 2016; 19, Gryzinska et al., 2016; 20, Penner et al., 2016; 21, Christiansen et al., 2016; 22, Eipel et al., 2016; 23, Mawlood et al., 2016; 24, Bentz et al., 2016; 25, Verhulst et al., 2016; 26, Caracappa et al., 2016; 27, Matsumoto et al., 2016; 28, Romano et al., 2017; 29, Stubbs et al., 2017).