For HPCs from mobilized blood, intracellular HA receptors correlate with HA binding, but surface HA receptors do not.r² is the regression coefficient when HA binding is set as the dependent variable. r^sis the Spearman rank order correlation coefficient that does not assume normal distribution and does not require assigning a dependent variable. Data points indicate individual patient samples assayed for both variables. Aliquots of the same samples were analyzed for all parameters in this figure.