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APA Citation
De Silva, S., Kollure, S., Amarasinghe, S., & Hemachandra, H. (n.d.). gallstone disease; a different disease in Sri Lanka. A Study to determine the prevalence of different types of gallstones in Sri Lanka. HPB, 18, e487–. http://access.bl.uk/ark:/81055/vdc_100056215939.0x000051