On the continuum in the nucleon form factors and the proton radius puzzleM. Hoferichter, B. Kubis, J. Ruiz de Elvira, H. -W. Hammer and U. -G. MeißnerEur. Phys. J. A, 52 11 (2016) 331DOI: https://doi.org/10.1140/epja/i2016-16331-7