1. Department of Virology and Bacteriology; Institute of Plant Protection - National Research Institute; Poznań Poland
2. Instituto de Biología Molecular y Celular de Plantas; Consejo Superior de Investigaciones Científicas - Universidad Politécnica de Valencia; València Spain
3. The Santa Fe Institute; Santa Fe Mexico
4. Institute of Molecular Biology and Biotechnology; Adam Mickiewicz University; Poznań Poland