Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) C.‐D. Hsu and T.R.B. Johnson and F.R. Witter,Fetal gender effect on pre‐eclampsia: A retrospective study of Baltimore area in the United States of America,International Journal of Gynecology & Obstetrics,0020-7292,Wiley,1994-05,45,2,160-161,https://cir.nii.ac.jp/crid/1363670320633473152,https://doi.org/10.1016/0020-7292(94)90125-2