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Sensitivity and specificity by values of Pronto-7 noninvasive hemoglobin assessment to identify excessive erythrocytosis (assessed using a laboratory hemoglobin analyzer). Specifically, we calculated sensitivity and specificity of having excessive erythrocytosis (defined as a measured hemoglobin concentration ≥21.0 g/dL in males and ≥19.0 g/dL in females) based on having an equal or greater threshold value for a range of Pronto-7 hemoglobin concentrations.
