Early myeloid lineage choice is not initiated by random PU.1 to GATA1 protein ratios by Hoppe, P, Schwarzfischer, M, Loeffler, D, Kokkaliaris, K, Hilsenbeck, O, Moritz, N, Endele, M, Filipczyk, A, Gambardella, A, Ahmed, N, Etzrodt, M, Coutu, D, Rieger, M, Marr, C, Strasser, M, Schauberger, B, Burtscher, I, Ermakova, O, Bürger, A, Lickert, H, Nerlov, C, Theis, F, Schroeder, T