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van den Hoed RD, Feldberg MA, van Leeuwen MS, van Dalen T, Obertop H, Kooyman CD, van der Schouw YT, de Graaf PW.van den Hoed RD, et al. Among authors: obertop h.Abdom Imaging. 1997 Mar-Apr;22(2):132-7. doi: 10.1007/s002619900157.Abdom Imaging. 1997.PMID: 9013520
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