<http://dx.doi.org/10.1001/jama.283.18.2381-jwr0510-2-1> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://purl.org/spar/fabio/Work> . <http://dx.doi.org/10.1001/jama.283.18.2381-jwr0510-2-1> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://purl.org/spar/fabio/JournalArticle> .