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Ruiz-Ballesteros, M.M., Marfil-Garza, B.A. Frostberg’s inverted three sign. Abdom Radiol 43, 1273–1274 (2018). https://doi.org/10.1007/s00261-017-1279-0
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DOI: https://doi.org/10.1007/s00261-017-1279-0