1. Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway. E-mails: {vladimir.mironov, erick.antezana, martin.kuiper}@bio.ntnu.no
2. School of Computer Science, The University of Manchester, Manchester, UK. E-mails: mikel.egana.aranguren@gmail.com, robert.stevens@manchester.ac.uk
3. Department of Mathematical Modelling, Statistics and Bioinformatics, Ghent University, Ghent, Belgium. E-mails: {ward.blonde, bernard.debaets}@ugent.be