About the Authors
Theoretical Epidemiology Group, Instituto Gulbenkian de Ciência, Oeiras, Portugal
Scientific Computing Program, Oswaldo Cruz Foundation, Rio de Janeiro, Rio de Janeiro, Brazil
The authors have declared that no competing interests exist.
Conceived and designed the experiments: FCC CTC. Performed the experiments: FCC. Analyzed the data: FCC CTC. Wrote the paper: FCC CTC.