Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) CLARK BA,Plasma endothelin levels in preeclampsia : elevation and correlation with uric acid levels and renal impairment,Am. J. Obstet. Gynecol.,,,1992,166,,962-968,https://cir.nii.ac.jp/crid/1570291224859713664,