1. Ludwig-Maximilians-University Munich, Department of Chemistry; Butenandtstraße 5-13 81377 Munich Germany
2. Molecular Networks GmbH; Neumeyerstraße 28 90411 Nürnberg Germany
3. University of Hamburg, ZBH - Center for Bioinformatics; Bundesstraße 43 20146 Hamburg Germany
4. Universidade Nova de Lisboa, Faculdade de Ciencias e Tecnologia, Departamento de Quimica; 2829-516 Caparica Portugal