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Leshchinskiy, S., Ali, N. & Akselrod, D. The onion skin sign of appendiceal mucocele. Abdom Radiol 43, 2527–2528 (2018). https://doi.org/10.1007/s00261-018-1489-0
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DOI: https://doi.org/10.1007/s00261-018-1489-0