into processes that may be operating nationally. It will now be necessary to test for the ubiquity of 52 these changes using appropriate broader spatial scale survey data. 53
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.