SLEEP and JCSM Studies Now Have DOI Numbers

Beginning with the current June issues of SLEEP and the Journal of Clinical Sleep Medicine, all papers, letters, and commentaries published in both journals now have a unique Digital Object Identifier (DOI) assigned to them. A DOI number is a permanent identifier that enables you to quickly locate digital content.  The DOI System makes it easy for you to find a study online when you enter the DOI number in a search on the CrossRef website.