Heavy-flavor production and medium properties in high-energy nuclear collisions --What next? G. Aarts, J. Aichelin, C. Allton, R. Arnaldi, S. A. Bass, C. Bedda, N. Brambilla, E. Bratkovskaya, P. Braun-Munzinger, G. E. Bruno et al. (39 more) Eur. Phys. J. A, 53 5 (2017) 93 Published online: 16 May 2017 DOI: 10.1140/epja/i2017-12282-9