A Correlation between Altmetrics scores and total number of citations, as identified on the ISI Web of Science. B Correlation between mentions on Twitter and total number of citations. C Correlation between mentions on news platforms and total number of citations. Closed data points, black solid lines and text represent initial analysis of 2018 in-print front-half materials. Open data points, grey dotted lines and text represent relationships between 2017 in-print front-half materials (n = 36) published in our original report, for comparison. Boxed data point indicates a putative outlier; removal of this data point did not change statistical outcomes with the exception that a significant relationship also emerged between citations and news mentions.