Corrigendum: Internet Blogs, Polar Bears, and Climate-Change Denial by Proxy. (28th March 2018) - Harvey, Jeffrey A; van den BERG, Daphne; Ellers, Jacintha; Kampen, Remko; Crowther, Thomas W; Roessingh, Peter; Verheggen, Bart; Nuijten, Rascha J M; Post, Eric; Lewandowsky, Stephan; Stirling, Ian; Balgopal, Meena; et al.