15 1996h-235 3 610 anemia anämie cancer chemotherapy complications drugtherapy erythropoiesis erythropoiesismolecularaspects erythropoietin erythropoietintherapeuticuse neoplasms physiology rekombinantesprotein renalanemia testing therapeuticuse treatment vs8000 wh150e73951991 wh150r4711996 yc2400