Correction: Platelet Calcium Metabolism in the Prediction of Preeclampsia

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Abstract
We have identified errors in our paper, "Altered Platelet Calcium Metabolism as an Early Predictor of Increased Peripheral Vascular Resistance and Preeclampsia in Urban Black Women" (Aug. 16, 1990, issue).* Errors in the platelet intracellular calcium levels and the responses to arginine vasopressin (AVP) and thrombin resulted from miscalculation of the AVP and thrombin responses for each sampling period (i.e., the responses calculated by dividing the peak calcium value by the basal value and expressing the result as a percentage increase). In addition, 4 of the 14 patients assigned to the preeclampsia group had proteinuria of less than 1 + and thus should not have been classified as preeclamptic. Platelet intracellular calcium responses to AVP could be evaluated in only 6 subjects with preeclampsia and 25 controls during the first sampling period. Finally, gestational ages were not calculated in a standardized fashion.