Masses of positive- and negative-parity hadron ground-states, including those with heavy quarks Pei-Lin Yin, Zhu-Fang Cui, Craig D. Roberts and Jorge Segovia Eur. Phys. J. C, 81 4 (2021) 327 Published online: 17 April 2021 DOI: 10.1140/epjc/s10052-021-09097-6