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BACKGROUND Plasma free metanephrines have proved a highly sensitive biochemical test for the diagnosis of pheochromocytoma. We have developed and validated a simple, LC-MS/MS method to determine(More)
In patients with chronic heart failure (CHF), anemia is associated with more severe symptoms and worse prognosis. Erythropoiesis-stimulating proteins (ESPs) increase hemoglobin and may be of(More)