Hans Erik Johnsen, Martin Bøgsted, Alexander Schmitz, Julie Støve Bødker, Tarec Christoffer El-Galaly, Preben Johansen, Peter Valent, Niklas Zojer, Els Van Valckenborgh, Karin Vanderkerken, Mark van Duin, Pieter Sonneveld, Martin Perez-Andres, Alberto Orfao, Karen Dybkær. The myeloma stem cell concept, revisited: from phenomenology to operational terms. Haematologica 2016;101(12):1451-1459; https://doi.org/10.3324/haematol.2015.138826.