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Steinbakk A, Gudlaugsson E, Aasprong OG, Skaland I, Malpica A, Feng W, Janssen EA, Baak JP.Steinbakk A, et al. Among authors: janssen ea.Am J Obstet Gynecol. 2011 Apr;204(4):357.e1-12. doi: 10.1016/j.ajog.2010.12.007. Epub 2011 Feb 16.Am J Obstet Gynecol. 2011.PMID: 21324435
Viste E, Vinje CA, Lid TG, Skeie S, Evjen-Olsen Ø, Nordström T, Thorsen O, Gilje B, Janssen EAM, Kjosavik SR.Viste E, et al.Scand J Prim Health Care. 2020 Sep;38(3):315-322. doi: 10.1080/02813432.2020.1802139. Epub 2020 Aug 8.Scand J Prim Health Care. 2020.PMID: 32772613Free PMC article.