The author would like to add the following funding information to his article (Palmira Reference Palmira2020):
Work on this article has received funding from the European Union’s Horizon 2020 Research and Innovation programme (H2020-MSCA-ITN-2015-675415); the Ministerio de Ciencia, Innovación y Universidades / Agencia Estatal de Investigación / Fondo Europeo de Desarrollo Regional, Unión Europea (RTI2018-096225-J-100); the Agència de Gestió d’Ajuts Universitaris i de Recerca (2016BP-00132).