A Frequentist analysis of three right-handed neutrinos with GAMBIT Marcin Chrzaszcz, Marco Drewes, Tomás E. Gonzalo, Julia Harz, Suraj Krishnamurthy and Christoph Weniger Eur. Phys. J. C, 80 6 (2020) 569 Published online: 24 June 2020 DOI: 10.1140/epjc/s10052-020-8073-9