21. The kidneys also produce hormones including calcitriol and erythropoietin . 22. Polycythemia can occur secondary to increased erythropoietin production caused by the chronic hypoxemia. 23. Erythropoietin can be helpful, but this is costly and may be dangerous.24. HIF-2 regulates erythropoietin production in adult life. 25. Epogen and its derivative Erythropoietin Stimulating Agents remain in use throughout the world. 26. Hydroxyethyl starch is associated with endurance athletes trying to cover up erythropoietin usage. 27. IL-11 or erythropoietin to increase the numbers of CFU-GEMM. 28. Erythropoietin and human growth hormone can't be detected on any existing test.29. Because the mechanism by which the house works is quite similar to taking erythropoietin . 30. Erythropoietin is produced in the kidneys and stimulates the production of red blood cells.