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Courtesy of Dcubillas. https://commons.wikimedia.org/wiki/File:Golden_Crescent_Moon.jpg. Assessed 12 June 2017.
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Yu, M.L., Lee, K.H. & Li, Y.L. The crescent sign in pneumatic reduction of intussusception. Abdom Radiol 43, 758–759 (2018). https://doi.org/10.1007/s00261-017-1259-4
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DOI: https://doi.org/10.1007/s00261-017-1259-4