1 Department of Fundamental Microbiology, University of Lausanne, Bâtiment Biophore, Quartier UNIL-Sorge, 1015 Lausanne, Switzerland. Electronic address: janroelof.vandermeer@unil.ch.
2 Hana Science Hall A-603, Department of Biotechnology, Korea University, Anam-dong, Seongbuk-Gu, Seoul 136-713, Republic of Korea. Electronic address: mbgu@korea.ac.kr.