[1
]The Exelixis Lab, Teaching and Research Unit Bioinformatics, Department of Computer
Science, Ludwig-Maximilians-University Munich Amalienstr. 17, D-80333, Munich, Germany;
E-mail: stamatakis@bio.ifi.lmu.de
[2
]San Diego Supercomputer Center La Jolla, California, USA
[3
]School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne Lausanne, Switzerland