DETECTION OF MALIGNANT DISEASE BY PERORAL RETROGRADE PANCREATICO-BILIARY DUCTOGRAPHYALAN H. ROBBINS, M.D., ROBERT E. PAUL, JR., M.D., RICHARD A. NORTON, M.D., ELIHU M. SCHIMMEL, M.D., JAIME G. TOMAS, M.D. and HERMAN J. SUGARMAN, M.D.
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Robbins et al. (1973) studied this question.
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