Light-quark mass behaviour of the X(3872) as a molecular state V. Baru, E. Epelbaum, A.A. Filin, J. Gegelia and A.V. Nefediev EPJ Web Conf., 113 (2016) 05015 Published online: 25 March 2016 DOI: 10.1051/epjconf/201611305015