Baryon chiral perturbation theory extended beyond the low-energy region E. Epelbaum, J. Gegelia, Ulf-G. Meißner and De-Liang Yao Eur. Phys. J. C, 75 10 (2015) 499 Published online: 22 October 2015 DOI: 10.1140/epjc/s10052-015-3728-7