B anomalies and dark matter: a complex connection D. G. Cerdeño, A. Cheek, P. Martín-Ramiro and J. M. Moreno Eur. Phys. J. C, 79 6 (2019) 517 Published online: 17 June 2019 DOI: 10.1140/epjc/s10052-019-6979-x