Authors: Jeanne S Sheffield; Erin L Butler-Koster; Brian M Casey; Donald D McIntire; Kenneth J Leveno Journal: Obstet Gynecol Date: 2002-11 Impact factor: 7.661
Authors: Ravi Thadhani; Myles Wolf; Karen Hsu-Blatman; Laura Sandler; David Nathan; Jeffrey L Ecker Journal: Am J Obstet Gynecol Date: 2003-07 Impact factor: 8.661