Birgit Mazurek, Heidemarie Haupt, Agnieszka J Szczepek, Jörg Sandmann, Johann Gross, Burghard F Klapp, Holger Kiesewetter, Ulrich Kalus, Timo Stöver, Philipp P Caffier
J Negat Results Biomed. 2009; 8: 3. Published online 2009 February 17. doi: 10.1186/1477-5751-8-3