1 The Living Systems Project, Dept. of Electronics and Informatics, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050, Brussels, Belgium. Electronic address: ricottam@etrovub.be.
2 Ministry of Education, Pisa, Italy. Electronic address: giuseppe.iurato@community.unipa.it.
3 Department of Biology, Memorial University of Newfoundland, St. John's, NL, 45 Arctic Avenue, A1C 5S7, Canada. Electronic address: igamberdiev@mun.ca.