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Bereźniak, M., Palczewski, P., Sułkowska, K. et al. Unilateral “white pyramid” sign in acute urinary tract obstruction. Abdom Radiol 47, 2277–2278 (2022). https://doi.org/10.1007/s00261-022-03505-5
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DOI: https://doi.org/10.1007/s00261-022-03505-5