The history on the early theories of humoral regulation of the erythropoiesis.
D001815:Bloodletting; D004920:Erythropoiesis / Q000266:history*; D004921:Erythropoietin / Q000096:biosynthesis / Q000494:pharmacology*; D049672:History, 19th Century; D049673:History, 20th Century; D010100:Oxygen; D010313:Partial Pressure
D004921:Erythropoietin; D010100:Oxygen