In accordance with major definitions of open access in the scientific literature (namely the Budapest, Berlin, and Bethesda declarations), PTL defines open access by the following conditions:

• peer-reviewed literature is freely available without subscription or price barriers,

• literature is immediately released in open access format (no embargo period), and

• published material can be re-used without obtaining permission as long as a correct citation to the original publication is given.

 

PTL journals started to publish articles under the Creative Commons Attribution License and using the latest version of the CC-BY license, which grants authors the most extensive rights.

 

This means that all articles published in PTL journals, including data, graphics, and supplements, can be linked from external sources, scanned by search engines, re-used by text mining applications or websites, blogs, etc. free of charge under the sole condition of proper accreditation of the source and original publisher. PTL believes that open access publishing fosters the exchange of research results amongst scientists from different disciplines, thus facilitating interdisciplinary research. Open access publishing also provides access to research results to researchers worldwide, including those from developing countries, and to an interested general public. Although PTL publishes all of its journals under the open access model, we believe that open access is an enriching part of the scholarly communication process that can and should co-exist with other forms of communication and publication, such as society-based publishing and conferencing activities.

 

Important Note: some articles (especially Reviews) may contain figures, tables or text taken from other publications, for which PTL does not hold the copyright or the right to re-license the published material. Please note that you should inquire with the original copyright holder (usually the original publisher or authors), whether or not this material can be re-used.

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The APC list is displaying the complete publication cost for the manuscripts in the respective journals in the partial-open access policy. If the authors feel the requirement to publish their content, article, letter, research, or review under the full open-access, they need to bare an extra charge of  USD ($) 1000 to publish in an open-access database else by default the publication will be under the Locked content. The readers need to purchase the content before they read. The open-access content increases the citation rate and popularity on the indexing database.