J. R. Soc. Interface 13, 20160070. (2016; Published online 2 March 2016) (doi:10.1098/rsif.2016.0070)
The authors wish to add the following statement to the Funding section of the paper:
The research leading to these results has received funding from the People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme (FP7/2007–2013) under REA grant agreement no. 625631.