Salivary progesterone and estriol among pregnant women treated with 17-α-hydroxyprogesterone caproate or placebo

Mark A. Klebanoff, Paul J. Meis, Mitchell P. Dombrowski, Yuan Zhao, Atef H. Moawad, Allison Northen, Baha M. Sibai, Jay D. Iams, Michael W. Varner, Steve N. Caritis, Mary J. O'Sullivan, Kenneth J. Leveno, Menachem Miodovnik, Deborah Conway, Ronald J. Wapner, Marshall Carpenter, Brian M. Mercer, Susan M. Ramin, John M. Thorp, Alan M. Peaceman