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Siemer J, Hilbert A, Wolf T, Hart N, Müller A, Schild RL.Siemer J, et al. Among authors: hart n.Fetal Diagn Ther. 2008;24(3):304-9. doi: 10.1159/000159269. Epub 2008 Oct 2.Fetal Diagn Ther. 2008.PMID: 18832848
Siemer J, Hilbert A, Hart N, Hoopmann M, Schneider U, Girschick G, Müller A, Schild RL.Siemer J, et al. Among authors: hart n.Ultrasound Obstet Gynecol. 2008 Apr;31(4):397-400. doi: 10.1002/uog.5294.Ultrasound Obstet Gynecol. 2008.PMID: 18383477Free article.
Hoopmann M, Bernau B, Hart N, Schild RL, Siemer J.Hoopmann M, et al. Among authors: hart n.Ultraschall Med. 2010 Feb;31(1):48-52. doi: 10.1055/s-0028-1109481. Epub 2010 Jan 20.Ultraschall Med. 2010.PMID: 20091464English, German.