Journal Special Collections offer an opportunity for editors to present a deep-dive into an important or emerging topic. Papers may be solicited by Special Collection Editors or submitted via a public Call for Papers. Papers accepted as part of a Special Collection are published in regular issues of the journal and then added to an online collection below. Journal Special Collections are dynamic with papers being added as appropriate. Readers interested in a particular theme are encouraged to visit the Special Collection frequently to find new content that has been added to the collection.