in Kürze mehr …
[1] https://www.sciencedirect.com/science/article/pii/S2589537019301191
[2] https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD004667.pub5/full/de?highlightAbstract=safe%7Cbirth
[3] http://quag.de/quag/publikationen.htm
