| http://www.w3.org/ns/prov#value | - Because the development of biorecombinant erythropoietin was still many years away, we had not yet learned that there were factors such as age, hyperparathyroidism, inflammation, inadequate dialysis, angiotensin antagonists, acidosis, and hyperphosphatemia4 that can produce erythropoietin resistance and distort such relationships as we had chosen to observe.
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