[1] German Canc Res Ctr, Div Mol Biol Cell 1, Heidelberg, Vic, Australia
[2] Coll France, Inst Biol, Paris, France
[3] Howard Hughes Med Inst, Res Labs, Ctr Neurobiol & Behav, New York, NY USA
[4] Univ Wurzburg, Inst Virol & Immunbiol, Wurzburg, Germany
[5] Schering AG, Enabling Technol, Berlin, Germany