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Llamas-Molina, J.M., Carrero Castaño, A. & Ruiz-Villaverde, R. sQUIZ your knowledge! A patch of blue-grey papules on the shoulder of an adolescent patient. Eur J Dermatol 31, 438–439 (2021). https://doi.org/10.1684/ejd.2021.4079
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DOI: https://doi.org/10.1684/ejd.2021.4079