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“a series of articles which are meant to be provocative”

European Journal of Immunology (EJI) features a series of viewpoints dedicated to Rolf Zinkernagel in celebration of his contribution to immunology in general and to EJI in particular — Rolf served with distinction as the Chairman of the Executive Committee of EJI from 2000 until the end of 2007. Rolf is well known, and often appreciated, for his heterodox views in immunology [1, 2], including those pertaining to “Suppressor/Regulatory T cells (Treg)”. Such cells are the focus of this viewpoint series, a series of articles which are meant to be provocative rather than a comprehensive coverage of all aspects of Treg cells. The series is expertly introduced by Shimon Sakaguchi, who recently reviewed the history of the Treg story for us [2]. I would also like to acknowledge the work of Elisabeth SuriPayer, a member of the Editorial Board of EJI, who actively contributed to the concept of this project through fruitful discussions with the editorial team. I wish to thank Elisabeth for all her knowledgeable advice. The editorial team is confident that this series of viewpoints will be of great interest and we are looking forward to publishing more exciting viewpoints and to hearing your suggestions and critiques. As well as the Treg viewpoint series, this issue contains, as always, the best in immunological research in the form of Frontline articles, Short Communications and fulllength research articles, together with opinion and news pieces; however, you will notice that this information is presented in a revised layout. The appearance of EJI underwent a major re-design in 2005 [4] and now, in 2008, this layout has been tweaked to enhance the best, and eliminate the worst, of the 2005 format. For some time, we have been aware of problems of the green background in the Highlights section, e.g. hiding text when faxing proof corrections to the editorial office. In addition, the first page of each article was felt to be cluttered, reducing the impact of key information such as the Abstract. To address these issues, the green shading has been replaced by a grey border and all the nonessential information, such as full correspondence details, current addresses, received/ revised/accepted dates etc., has been moved to the end of each article; the font has also been updated. We believe that with this revised layout we now have a format which is truly in keeping with EJI's top-ranking position — EJI is ranked number 10 of all the primary immunology research articles according to ISI's most recent data.