Note to users: The section "Articles in Press" contains peer reviewed and accepted articles to be published in this journal. When the final article is assigned to an issue of the journal, the "Article in Press" version will be removed from this section and will appear in the associated journal issue. Please be aware that "Articles in Press" do not have all bibliographic details available yet. There are three types of "Articles in Press":

• Accepted Manuscripts: these are manuscripts that have been selected for publication. They have not been typeset and the text may change before final publication.
• Uncorrected proofs: these are articles that are not yet finalized and that will be corrected by the authors. Therefore the text could change before final publication. Uncorrected proofs may be temporarily unavailable for production reasons.
• Corrected proofs: these are articles containing the authors' corrections. The content of the article will usually remain unchanged, and possible further corrections are fairly minor. Typically the only difference with the finally published article is that specific issue and page numbers have not yet been assigned.