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S. K. Gupta, Bowel Diseases Research Department, School of Tropical Medicine, Calcutta
B. C. Chatterjee, Bowel Diseases Research Department, School of Tropical Medicine, Calcutta
B. M. Paul, Bowel Diseases Research Department, School of Tropical Medicine, Calcutta
R. N. Ghose, Bowel Diseases Research Department, School of Tropical Medicine, Calcutta
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