The nucleon mass and pion-nucleon sigma term from a chiral analysis of Nf = 2 lattice QCD world dataL. Alvarez-Ruso, T. Ledwig, J. Martin Camalich and M. J. Vicente VacasEPJ Web of Conferences, 66 (2014) 06001DOI: https://doi.org/10.1051/epjconf/20146606001