HIF-1α is a protective factor in conditional PHD2-deficient mice suffering from severe HIF-2α-induced excessive erythropoiesis. by Franke, K, Kalucka, J, Mamlouk, S, Singh, R, Muschter, A, Weidemann, A, Iyengar, V, Jahn, S, Wieczorek, K, Geiger, K, Muders, M, Sykes, A, Poitz, D, Ripich, T, Otto, T, Bergmann, S, Breier, G, Baretton, G, Fong, G, Greaves, D, Bornstein, S, Chavakis, T, Fandrey, J, Gassmann, M, Wielockx, B