CPI's archived modules that have been assigned a Digital Object Identifier (DOI) and are no longer available for sale are listed here. CPI's self-assessment modules are designated for AMA PRA Category 1 Credits™, and when this credit expires, the module is removed from sale. The ACR releases new modules in each topic area every 2-3 years to offer the most up to date and relevant information and older modules are eventually retired. Modules are typically available 5-6 years after publication.