van de Donk, N. W., Palumbo, A., Johnsen, H. E., Engelhardt, M., Gay, F., Gregersen, H., Hajek, R., Kleber, M., Ludwig, H., Morgan, G., Musto, P., Plesner, T., Sezer, O., Terpos, E., Waage, A., Zweegman, S., Einsele, H., Sonneveld, P. and Lokhorst, H. M. (2014) “The clinical relevance and management of monoclonal gammopathy of undetermined significance and related disorders: recommendations from the European Myeloma Network”, Haematologica. Pavia, Italy, 99(6), pp. 984-996. doi: 10.3324/haematol.2013.100552.