Authors may archive their preprint manuscripts (version prior to peer review) at any time without restrictions. Authors may archive their postprint manuscripts (accepted version after peer review) in institutional repositories, preprint servers, and research networks after a 12 month embargo. The 12 month embargo period begins when the article is published online. Postprints must not be used for commercial purposes and acknowledgement must be given to the final publication, and publisher, by inserting the DOI number of the article in the following sentence: “Final publication is available from Mary Ann Liebert, Inc., publishers http:///[insert DOI]”. Authors may archive on their personal website without an embargo provided their manuscript is updated with an acknowledgement to the publisher copyright and final published version.