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Edgar Petru, Birgit Volgger, Gerhard Bogner, Lukas Angleitner-Boubenizek, Martina Deibl, Christian Schauer, Alexander Reinthaller, Gerhard Wolfram, Alain Gustave Zeimet, Christian Marth 
World J Obstet Gynecol 1(3):35-39. Published online Oct 10, 2012. doi: 10.5317/wjog.v1.i3.35