Copyright Information

This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.

IEEE Copyright Notice : Copyright (©) 1995-2001, IEEE. The IEEE owns the copyright to all material included below that is published by the IEEE. Personal use of this material is permitted. However, permission to reprint / republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE. For more information please refer to the IEEE policies for the new publishing and communications technologies. Request permissions from : Manager, Copyrights and Permissions / IEEE Service Center / 445 Hoes Lane / P.O. Box 1331 / Piscataway, NJ 08855-1331, USA. Telephone: + Intl. 908-562-3966.

Authors of Elsevier-published articles have the right to post a preprint version of the journal article on Internet websites including electronic pre-print servers, and to retain indefinitely such version on such servers or sites for scholarly purposes, with some exceptions such as The Lancet and Cell Press. The articles may be used only for scholarly purposes as set out above and may not be used or posted for commercial purposes or under policies or other mechanisms designed to aggregate and openly disseminate manuscripts or articles or to substitute for journal-provided services. This includes the use or posting of articles for commercial gain or to substitute for the services provided directly by the journal including the posting by companies of their employee-authored works for use by customers of such companies (e.g. pharmaceutical companies and physician-prescribers); commercial exploitation such as directly associating advertising with such postings; the charging of fees for document delivery or access; the systematic distribution to others via e-mail lists or list servers (to parties other than known colleagues), whether for a fee or for free; the posting of links to sponsored articles by commercial third parties including pharmaceutical companies; institutional, funding body or government manuscript posting policies or mandates that aim to aggregate and openly distribute the accepted, peer reviewed manuscripts or published journal articles authored by its researchers or funded researchers; and subject repositories that aim to aggregate and openly distribute accepted peer reviewed manuscripts or published journal articles authored by researchers in specific subject areas.

This website uses cookies. There are two types of cookies: The first type supports the basic functionality of our website. The second allows us to improve our content for you by saving and analyzing pseudonymised user data. Since this second type is technically not required to run the website, you can withdraw your consent to those cookies at any time. For more information please visit our pages on data protection.


These cookies are needed for a smooth operation of our website.


For statistical reasons, we use the platform Matomo to analyse the user flow with the help of website users‘ pseudonymised data. This allows us to optimize website content.

Name Purpose Lifetime Type Provider
_pk_id Used to store a few details about the user such as the unique visitor ID. 13 months HTML Matomo
_pk_ref Used to store the attribution information, the referrer initially used to visit the website. 6 months HTML Matomo
_pk_ses Short lived cookie used to temporarily store data for the visit. 30 minutes HTML Matomo