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Stafford I, Hernandez J, Laibl V, Sheffield J, Roberts S, Wendel G Jr.Stafford I, et al.Obstet Gynecol. 2008 Sep;112(3):533-7. doi: 10.1097/AOG.0b013e31818187b0.Obstet Gynecol. 2008.PMID: 18757649
Wall KM, Workowski K, Young M, Stafford IA.Wall KM, et al. Among authors: stafford ia.JAMA. 2025 Jan 16. doi: 10.1001/jama.2025.0171. Online ahead of print.JAMA. 2025.PMID: 39820296
Tudela CM, Stewart RD, Roberts SW, Wendel GD Jr, Stafford IA, McIntire DD, Sheffield JS.Tudela CM, et al. Among authors: stafford ia.Obstet Gynecol. 2012 Mar;119(3):626-9. doi: 10.1097/AOG.0b013e31824532f6.Obstet Gynecol. 2012.PMID: 22353962