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Lock, G. and Zülke, C. and Lerch, K. and Andreesen, Reinhard and Eilles, C. and Jauch, K. W. and Feuerbach, S. and Schölmerich, J. (2000) The ultrasound centre as a medically and economically relevant alternative--a report of the Regensburg experience. Zeitschrift für Gastroenterologie 38 (12), pp. 941-4.