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Reyes, Melissa A.; Eichenfield, Lawrence F. (2012-01-01), Long, Sarah S. (ed.), "73 - Purpura", Principles and Practice of Pediatric Infectious Diseases (Fourth Edition), London: Elsevier, pp. 441–444.e1, ISBN978-1-4377-2702-9, archived from the original on 2022-09-30, retrieved 2022-08-02
Reyes, Melissa A.; Eichenfield, Lawrence F. (2012-01-01), Long, Sarah S. (ed.), "73 - Purpura", Principles and Practice of Pediatric Infectious Diseases (Fourth Edition), London: Elsevier, pp. 441–444.e1, ISBN978-1-4377-2702-9, archived from the original on 2022-09-30, retrieved 2022-08-02