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Mettler FA Jr, Koenig TR, Wagner LK, Kelsey CA.Mettler FA Jr, et al. Among authors: koenig tr.Semin Ultrasound CT MR. 2002 Oct;23(5):428-42. doi: 10.1016/s0887-2171(02)90014-4.Semin Ultrasound CT MR. 2002.PMID: 12509113Review.