AUTHOR=Manuck Tracy A. TITLE=Refining Pharmacologic Research to Prevent and Treat Spontaneous Preterm Birth JOURNAL=Frontiers in Pharmacology VOLUME=8 YEAR=2017 URL=https://www.frontiersin.org/journals/pharmacology/articles/10.3389/fphar.2017.00118 DOI=10.3389/fphar.2017.00118 ISSN=1663-9812