The pituitary erythropoietic factor.
D004912:Erythrocytes / Q000502:physiology*; D006410:Hematopoiesis; D010902:Pituitary Gland; D010903:Pituitary Gland, Anterior / Q000502:physiology*
ERYTHROCYTES/physiology; HEMATOPOIESIS; PITUITARY GLAND, ANTERIOR/physiology