PCD journal provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge. There is no author charges (known as Article Processing Charges/APSs) prior to publication. Also, there is no charges for readers to download the articles in PCD Journal: Users have the right to read, download, copy, distribute, print, search, or link to the full texts of articles in this journal, or to use them for any other lawful purpose.