An empirical recipe for inelastic hydrogen-atom collisions in non-LTE calculations R. Ezzeddine, T. Merle, B. Plez, M. Gebran, F. Thévenin and M. Van der Swaelmen A&A, 618 (2018) A141 Published online: 22 October 2018 DOI: 10.1051/0004-6361/201630352