1. Fraunhofer Institute for Molecular Biology and Applied Ecology (IME); Forckenbeckstrasse 6, 52074 Aachen Germany
2. Research Center for Infectious Diseases; University of Wuerzburg; Josef Schneider Str. 2/Bau D15, 97080 Wuerzburg Germany
3. Institute for Molecular Biotechnology; RWTH Aachen University; Worringer Weg 1, 52074 Aachen Germany