On the axial-vector form factor of the nucleon and chiral symmetry Matthias F. M. Lutz, Ulrich Sauerwein and Rob G. E. Timmermans Eur. Phys. J. C, 80 9 (2020) 844 Published online: 12 September 2020 DOI: 10.1140/epjc/s10052-020-8417-5