Secondary analysis of the use of transdermal nitroglycerin for preterm labor.

Smith GN, Guo Y, Wen SW, Walker MC; Canadian Preterm Labor Nitroglycerin Trial Group..

Am J Obstet Gynecol. 2010 Dec;203(6):565.e1-6. doi: 10.1016/j.ajog.2010.07.018.
https://www.ncbi.nlm.nih.gov/pubmed/20817132