The January 2011 issue includes 6 papers that are copublished by Chronic Diseases in Canada ( CDIC ) and Preventing Chronic Disease ( PCD ) . In this example of copublishing, each journal is the primary publisher of 3 of the papers and secondary publisher of the other 3. Copublication is uncommon among scientific journals; however, it does offer an opportunity for journals to reach a broader readership with information about areas of common interest. The International Committee of Medical Journal Editors identifies this model of publishing as appropriate when 2 journals with different readerships are publishing information about topics that may appeal to both.