English language tweets including #regionalanesthesia or #regionalanaesthesia were prospectively collected using TAGS V.6.1.9.1.3 The first tweet in either hashtag archive to reference COVID-19 was on March 18, 2020. We therefore set our convenience sample from February 1 through April 30, 2020, to compare tweets 6 weeks before (pre) and after (post) this seminal tweet. We included original tweets, replies, and retweets. We excluded duplicates and tweets lacking either hashtag.
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