Applicability and reproducibility of acute myeloid leukaemia stem cell assessment in a multi‐centre setting by Hanekamp, D, Snel, AN, Kelder, A, Scholten, WJ, Khan, N, Metzner, M, Irno-Consalvo, M, Sugita, M, de Jong, A, Oude Alink, S, Eidhof, H, Wilhelm, M, Feuring-Buske, M, Slomp, J, van der Velden, VHJ, Sonneveld, E, Guzman, M, Roboz, GJ, Buccisano, F, Vyas, P, Freeman, S, Bachas, C, Ossenkoppele, GJ, Schuurhuis, GJ, Cloos, J