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- The role of enzyme treatment in pancreatic disease / (ed.) H. G. Beger, M. W. Büchler, K. Gyr. 1993. Vol. 54, suppl. 2 - Basel : Karger, 1993 - 53 s.(Digestion; Vol. 54, suppl. 2 (1993)) ISBN 3-8055-5861-9 [1, currently available 0, at library only 1]
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