Jolie, P E Considering hyperestrogenism as a cause of anemia. [electronic resource] - Journal of the American Veterinary Medical Association Jul 1990 - 12 p. digital Publication Type: Letter; Comment ISSN: 0003-1488 Subjects--Topical Terms: Anemia--etiologyAnimalsBird Diseases--etiologyEstrogens--metabolismPsittaciformes