Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Carmen Giurgescu,Are Maternal Cortisol Levels Related to Preterm Birth?,"Journal of Obstetric, Gynecologic & Neonatal Nursing",0884-2175,Elsevier BV,2009-07,38,4,377-390,https://cir.nii.ac.jp/crid/1362544420817952896,https://doi.org/10.1111/j.1552-6909.2009.01034.x