1. IBB-Institute for Bioengineering and Biosciences, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal
2. Instituto Gulbenkian de Ciência, Oeiras, Portugal
3. Department of Microbiology and Molecular Genetics, Center for Evolutionary Biology and Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
4. Department of Bioengineering, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal